Publications and communications of Sébastien Pierard

Pierard, S., Cioppa, A., Halin, A., Vandeghen, R., Maxime Zanella, Benoît Macq, Saïd Mahmoudi, & Van Droogenbroeck, M. (30 March 2023). Pushing AI out of the lab with on-the-fly mixture domain adaptation [Paper presentation]. The European AI week, Brussels, Belgium.

Pierard, S., Cioppa, A., Halin, A., Vandeghen, R., Maxime Zanella, Benoît Macq, Saïd Mahmoudi, & Van Droogenbroeck, M. (2023). Mixture Domain Adaptation to Improve Semantic Segmentation in Real-World Surveillance. In Proceedings of IEEE/CVF Winter Conference on Applications of Computer Vision (WACVW) (pp. 22-31). IEEE. doi:10.1109/wacvw58289.2023.00007

Charlier, D., Magrean, B., Pierard, S., & Taghon, P. (September 2022). Die Ourthe in Belgien: ein Fluss durchquert das Devon. Fossilien, 5 (39), 4-9.

Braham, M., & Pierard, S. (01 March 2022). Foreground and background detection method.

Pierard, S., Braham, M., & Van Droogenbroeck, M. (2022). An exploration of the performances achievable by combining unsupervised background subtraction algorithms. ORBi-University of Liège. https://orbi.uliege.be/handle/2268/288482. doi:10.48550/arXiv.2202.12563

Cantalloube, F., Gomez Gonzalez, C., Absil, O., Cantero Mitjans, C., Bacher, R., Bonse, M. J., Bottom, M., Dahlqvist, C.-H., Desgrange, C., Flasseur, O., Fuhrmann, T., Henning, T., Jensen-Clem, R., Kenworthy, M., Mawet, D., Mesa, D., Meshkat, T., Mouillet, D., Müller, A., ... Van Droogenbroeck, M. (2020). Exoplanet imaging data challenge: benchmarking the various image processing methods for exoplanet detection. In L. Schreiber, D. Schmidt, ... E. Vernet, Adaptive Optics Systems VII (pp. 1-36). Bellingham, WA, United States: SPIE. doi:10.1117/12.2574803

Pierard, S., & Van Droogenbroeck, M. (2020). Summarizing the performances of a background subtraction algorithm measured on several videos. In Proceedings of the IEEE International Conference on Image Processing (ICIP) (pp. 3234-3238). doi:10.1109/ICIP40778.2020.9190865

Van Droogenbroeck, M., Braham, M., & Pierard, S. (08 July 2020). Foreground and background detection method.

Van Droogenbroeck, M., Braham, M., & Pierard, S. (07 April 2020). Foreground and background detection method.

Van Droogenbroeck, M., Braham, M., & Pierard, S. (February 2019). Foreground and background detection method.

Laugraud, B., Pierard, S., & Van Droogenbroeck, M. (25 June 2018). LaBGen-P-Semantic: A First Step for Leveraging Semantic Segmentation in Background Generation. Journal of Imaging, 4 (7), 86. doi:10.3390/jimaging4070086

Azrour, S., Pierard, S., Geurts, P., & Van Droogenbroeck, M. (2017). A two-step methodology for human pose estimation increasing the accuracy and reducing the amount of learning samples dramatically. In Advanced Concepts for Intelligent Vision Systems (pp. 3-14). Springer. doi:10.1007/978-3-319-70353-4_1

Braham, M., Pierard, S., & Van Droogenbroeck, M. (2017). Semantic Background Subtraction. In IEEE International Conference on Image Processing (ICIP), Beijing 17-20 September 2017 (pp. 4552-4556). IEEE. doi:10.1109/ICIP.2017.8297144

Wang, Y., Pierard, S., Su, S.-Z., & Jodoin, P.-M. (01 September 2017). Improving pedestrian detection using motion-guided filtering. Pattern Recognition Letters, 96, 106-112. doi:10.1016/j.patrec.2016.11.020

Laugraud, B., Pierard, S., & Van Droogenbroeck, M. (2017). LaBGen: A method based on motion detection for generating the background of a scene. Pattern Recognition Letters, 96, 12-21. doi:10.1016/j.patrec.2016.11.022

Laugraud, B., Pierard, S., & Van Droogenbroeck, M. (2016). LaBGen-P: A Pixel-Level Stationary Background Generation Method Based on LaBGen. In 2016 International Conference on Pattern Recognition Contest Proceedings (pp. 107-113). IEEE. doi:10.1109/ICPR.2016.7899617

Pierard, S., & Van Droogenbroeck, M. (16 September 2016). What are the optimal walking tests to assess disability progression? Multiple Sclerosis Journal, 22 (S3), 452-453.

Azrour, S., Pierard, S., & Van Droogenbroeck, M. (2016). Leveraging orientation knowledge to enhance human pose estimation methods. In Articulated Motion and Deformable Objects AMDO 2016 (pp. 81-87). Springer. doi:10.1007/978-3-319-41778-3_8

Pierard, S., Lejeune, A., & Van Droogenbroeck, M. (July 2016). Boosting shape classifiers accuracy by considering the inverse shape. Journal of Pattern Recognition Research, 11 (1), 41-54. doi:10.13176/11.727

Azrour, S., Pierard, S., & Van Droogenbroeck, M. (19 May 2016). Improving pose estimation by building dedicated datasets and using orientation [Poster presentation]. Human Motion Analysis for Healthcare Applications, London, United Kingdom.

Pierard, S., Azrour, S., & Van Droogenbroeck, M. (19 May 2016). Slicing the 3D space into planes for the fast interpretation of human motion [Poster presentation]. Human Motion Analysis for Healthcare Applications, London, United Kingdom.

Azrour, S., Pierard, S., & Van Droogenbroeck, M. (09 October 2015). Defining a score based on gait analysis for the longitudinal follow-up of MS patients. Multiple Sclerosis Journal, 23 (S11), 408-409.

Pierard, S., Phan-Ba, R., & Van Droogenbroeck, M. (09 October 2015). Understanding how people with MS get tired while walking [Paper presentation]. ECTRIMS, Bercelona, Spain.

Laugraud, B., Pierard, S., Braham, M., & Van Droogenbroeck, M. (2015). Simple Median-Based Method for Stationary Background Generation Using Background Subtraction Algorithms. In New Trends in Image Analysis and Processing - ICIAP 2015 Workshops (pp. 477-484). Springer. doi:10.1007/978-3-319-23222-5_58

Pierard, S., & Van Droogenbroeck, M. (2015). A perfect estimation of a background image does not lead to a perfect background subtraction: analysis of the upper bound on the performance. In International Conference on Image Analysis and Processing (ICIAP) (pp. 527-534). Springer. doi:10.1007/978-3-319-23222-5_64

Wang, Y., Pierard, S., Su, S.-Z., & Jodoin, P.-M. (2015). Nonlinear Background Filter to Improve Pedestrian Detection. In New Trends in Image Analysis and Processing - ICIAP 2015 Workshops (pp. 535-543). Springer. doi:10.1007/978-3-319-23222-5_65

Phan-Ba, R., Giet, A., Pierard, S., & Van Droogenbroeck, M. (10 April 2015). Individual variation of gait parameters along a 500 meter walk in people with multiple sclerosis and healthy volonteers [Poster presentation]. 20th Annual Conference of Rehabilitaon In Multiple Sclerosis (RIMS), Milan, Italy.

Phan-Ba, R., Pierard, S., Giet, A., & Van Droogenbroeck, M. (10 April 2015). Individual variation of gait characteristics along a 500 meter walk in people with multiple sclerosis and healthy volunteers [Paper presentation]. RIMS (Rehabilitation in Multiple Sclerosis), Milano, Italy.

Giet, A., Pierard, S., Foidart-Dessalle, M., Van Droogenbroeck, M., & Phan-Ba, R. (April 2015). Assessment of physical therapy and activity in multiple sclerosis (APTAIMS): development, reliability and validity of a new questionnaire [Paper presentation]. RIMS (Rehabilitation in Multiple Sclerosis), Milano, Italy.

Pierard, S., Phan-Ba, R., Giet, A., & Van Droogenbroeck, M. (April 2015). GAIMS: a tool specifically developed for the clinical gait analysis of patients with multiple sclerosis [Paper presentation]. RIMS (Rehabilitation in Multiple Sclerosis), Milano, Italy.

Pierard, S. (27 February 2015). 3D human motion analysis based on ultra-low resolution sensors [Paper presentation]. Conference given at the NRC (National Research Council Canada), Ottawa, Canada.

Pierard-Franchimont, C., Hermanns-Lê, T., Pierard, G., & Pierard, S. (2015). Comment j'explore ... le "cheetah-look". Regard sur la peau sous des longueurs d'ondes particulieres de la lumiere. Revue Médicale de Liège, 70 (4), 204-6.

Pierard, G., Franchimont, C., Hermanns-Lê, T., & Pierard, S. (2015). Regarder dans une boule de cristal et dépister des sujets à risque pour le mélanome cutané. Revue Médicale de Liège, 70, 446-449.

Pierard, G., Hermanns-Lê, T., Franchimont, C., & Pierard, S. (2015). Analytical assessment of TNF-antagonist early effects on psoriasis. IN vivo real-time reflectance confocal microscopy and skin capacitance mapping. Medical Diagnostic Methods, 4, 1000165.

Pierard, S. (24 October 2014). The marauder's map or the use of non-intrusive range laser scanners in the context of smart rooms [Paper presentation]. Séminaire du CREI, Sherbrooke, Canada.

Pierard, S., Azrour, S., Phan-Ba, R., DELVAUX, V., Maquet, P., & Van Droogenbroeck, M. (11 September 2014). Diagnosing multiple sclerosis with a gait measuring system, an analysis of the motor fatigue, and machine learning [Paper presentation]. Joint ACTRIMS-ECTRIMS Meeting, Boston, United States.

PIERARD, G., Hermanns-Lê, T., Pierard, S., Dewalque, L., Charlier, C., Pierard-Franchimont, C., & DELVENNE, P. (22 August 2014). In vivo skin fluorescence imaging in young Caucasian adults with early malignant melanomas. Clinical, Cosmetic and Investigational Dermatology, 7, 225-230. doi:10.2147/CCID.S66929

Jodoin, P.-M., Pierard, S., Wang, Y., & Van Droogenbroeck, M. (2014). Overview and Benchmarking of Motion Detection Methods. In Bouwmans, Porikli, Hoferlin, ... Vacavant (Eds.), Background Modeling and Foreground Detection for Video Surveillance (9781482205374). Chapman and Hall/CRC. doi:10.1201/b17223-34

Pierard, S. (19 June 2014). Introduction to Bayes' classifier and to the on-the-fly bayesian domain adaptation [Paper presentation]. Séminaire INTELSIG.

Pierard, S., Azrour, S., Phan-Ba, R., & Van Droogenbroeck, M. (17 June 2014). Detection and characterization of gait modifications, for the longitudinal follow-up of patients with neurological diseases, based on the gait analyzing system GAIMS [Poster presentation]. The European Life Sciences Summit BIOMEDICA, Maastricht, Netherlands.

Pierard, S., Marcos Alvarez, A., Lejeune, A., & Van Droogenbroeck, M. (2014). On-the-fly domain adaptation of binary classifiers. In 23rd Belgian-Dutch Conference on Machine Learning (BENELEARN) (pp. 20-28).

Pierard, S., Azrour, S., & Van Droogenbroeck, M. (2014). Design of a reliable processing pipeline for the non-intrusive measurement of feet trajectories with lasers. In International Conference on Acoustics, Speech, and Signal Processing (ICASSP) (pp. 4432-4436). doi:10.1109/ICASSP.2014.6854433

Pierard, S., Phan-Ba, R., & Van Droogenbroeck, M. (2014). Machine learning techniques to assess the performance of a gait analysis system. In European Symposium on Artificial Neural Networks, Computational Intelligence and Machine Learning (ESANN) (pp. 419-424).

Azrour, S., Pierard, S., Geurts, P., & Van Droogenbroeck, M. (2014). Data normalization and supervised learning to assess the condition of patients with multiple sclerosis based on gait analysis. In European Symposium on Artificial Neural Networks, Computational Intelligence and Machine Learning (ESANN) (pp. 649-654).

Pierard, S. (2014). Introduction à $BASH (Bourne-again shell).

Hermanns-Lê, T., & Pierard, S. (25 February 2014). Streamlining cutaneous melanomas in young women of the Belgian Mosan region. BioMed Research International, 2014. doi:10.1155/2014/320767

Franchimont, C., Hermanns-Lê, T., Pierard, S., & PIERARD, G. (2014). Changements climatiques et l'antinomie de l'eau qui déshydrate. Revue Médicale de Liège, 69, 618-621.

PIERARD, G., Franchimont, C., & Pierard, S. (2014). Visioscan-driven ULEV method. In E. Berardesca (Ed.), Non invasive diagnostic techniques in clinical dermatology. Berlin, Heidelberg, Germany: Springer Verlag. doi:10.1007/978-3-642-32109-2_2

PIERARD, G., Hermanns-Lê, T., Franchimont, C., Courtois, J., & Pierard, S. (2014). Analytical search of sensory irritation to shampoos in reactive scalp. Labome Materials and Methods, 4, 1097.

PIERARD, G., Pierard, S., Franchimont, C., & Delvenne, P. (2014). Hand dermometrology. In A. Alikhan, J. M. Lachapelle, ... M. I. Maibach (Eds.), Textbook of hand eczema. Berlin, Heidelberg, Germany: Springer-Verlag.

Pierard, S., PIERARD, G., Hermanns-Lê, T., Hermanns, J.-F., & Franchimont, C. (2014). Greenhouse gas-related climate changes and some expected skin alterations. Austin Journal of Dermatology, 1, 3.

Pierard, S. (2013). Les avatars de la 3D: le divertissement et au-delà [Paper presentation]. Doc Café, Liège, Belgium.

Azrour, S., Pierard, S., & Van Droogenbroeck, M. (07 November 2013). Using GAit Measuring System (GAIMS) to discriminate patients with multiple sclerosis from healthy person [Poster presentation]. Workshop on measurement : Challenges and Opportunities, Liège, Belgium.

Laugraud, B., Pierard, S., & Van Droogenbroeck, M. (07 November 2013). Metrics to evaluate binary classifiers for video background extraction: weaknesses, strengths, and perspectives [Paper presentation]. Workshop on measurement : Challenges and Opportunities, Liège, Belgium.

Pierard, S., Azrour, S., & Van Droogenbroeck, M. (07 November 2013). Measuring feet trajectories: challenges and applications [Paper presentation]. Workshop on measurement : Challenges and Opportunities, Liège, Belgium.

PHAN BA, R., Pierard, S., LOMMERS, E., DELRUE, G., CALAY, P., Van Droogenbroeck, M., DELVAUX, V., & MAQUET, P. (October 2013). Relative Contribution of Walking Speed, Ataxia and Gait asymmetry to the Composition of Gait in Multiple Sclerosis. Multiple Sclerosis Journal, 19 (S1), 261.

Pierard, S., Azrour, S., PHAN BA, R., & Van Droogenbroeck, M. (October 2013). GAIMS: A Reliable Non-Intrusive Gait Measuring System. ERCIM News, 95, 26-27.

Pierard, S., PHAN BA, R., DELVAUX, V., Maquet, P., & Van Droogenbroeck, M. (October 2013). GAIMS: a powerful gait analysis system satisfying the constraints of clinical routine [Paper presentation]. European Committee for Treatment and Research in Multiple Sclerosis (ECTRIMS), Copenhagen, Denmark.

PHAN BA, R., DELRUE, G., Pierard, S., LOMMERS, E., CALAY, P., Van Droogenbroeck, M., & DELVAUX, V. (10 June 2013). Influence of the mode of walk on walking speed in multiple sclerosis: are you walking comfortably? [Poster presentation]. Twenty-third meeting of the European Neurological Society, Barcelona, Spain.

Osmalsky, J., Pierard, S., Van Droogenbroeck, M., & Embrechts, J.-J. (2013). Efficient database pruning for large-scale cover song recognition. In International Conference on Acoustics, Speech, and Signal Processing (ICASSP). IEEE.

PIERARD, G., Pierard, S., Delvenne, P., & Franchimont, C. (2013). In vivo evaluation of the skin tensile strength by the suction method: pilot study coping with hysteresis and creep extension. ISRN Dermatology, 2013, 841217. doi:10.1155/2013/841217

Pierard, S., Pierlot, V., Lejeune, A., & Van Droogenbroeck, M. (2012). I-see-3D! An Interactive and Immersive System that dynamically adapts 2D projections to the location of a user’s eyes. In International Conference on 3D Imaging (IC3D) (pp. 8). doi:10.1109/IC3D.2012.6615140

PHAN BA, R., Pierard, S., Moonen, G., Van Droogenbroeck, M., & Belachew, S. (12 October 2012). Deciphering Distance-Induced Deceleration of Gait and Ataxia in People with Multiple Sclerosis. Multiple Sclerosis Journal, 18 (S4), 338.

PHAN BA, R., Pierard, S., MOONEN, G., Van Droogenbroeck, M., & Belachew, S. (11 October 2012). Detection and Quantification of Efficiency and Quality of Gait Impairment in Multiple Sclerosis through Foot Path Analysis. Multiple Sclerosis Journal, 18 (S4), 110.

Lejeune, A., Pierard, S., Van Droogenbroeck, M., & Verly, J. (July 2012). Utilisation de la Kinect. Linux Magazine France, 151, 16-29.

Osmalsky, J., Embrechts, J.-J., Van Droogenbroeck, M., & Pierard, S. (2012). Neural networks for musical chords recognition. In Journées d'informatique musicale (pp. 39-46).

Pierard, S., Lejeune, A., & Van Droogenbroeck, M. (2012). Recognition of emotions in facial images.

Pierard, S., & Van Droogenbroeck, M. (2012). On the human pose recovery based on a single view. In International conference on pattern recognition applications and methods (ICPRAM) (pp. 310-315 (in volume 2).

Pierard, S., & Van Droogenbroeck, M. (2012). Estimation of human orientation based on silhouettes and machine learning principles. In International conference on pattern recognition applications and methods (ICPRAM) (pp. 51-60 (in volume 2).

Belachew, S., Pierard, S., PHAN BA, R., & Van Droogenbroeck, M. (2012). Multimodal evaluation of gait and stride dynamics in relapsing and progressive forms of multiple sclerosis. Proceedings of the Belgian Royal Academies of Medicine, 1, 66-69.

Hermanns-Lê, T., AL RUSTOM, K., FRANCHIMONT, C., PIERARD, G., & Pierard, S. (2012). Le "cheetah-look". Le phénotype guépart, face cachée de la pigmentation mélanique innée du visage. Dermatologie Actualité, 131, 8-10.

REGINSTER, M.-A., Pierard, S., PIERARD, G., & QUATRESOOZ, P. (2012). Télédermatopathologie et dermatopathologie virtuelle en temps réel. Dermatologie Actualité, 129, 8-9.

Lejeune, A., Pierard, S., Van Droogenbroeck, M., & Verly, J. (2011). A new jump edge detection method for 3D cameras. In International Conference on 3D Imaging (IC3D) (pp. 7). IEEE. doi:10.1109/IC3D.2011.6584393

Pierard, S., PHAN BA, R., Van Droogenbroeck, M., & Belachew, S. (2011). A new low-cost and non-intrusive feet tracker. In Workshop on Circuits, Systems and Signal Processing (ProRISC) (pp. 382-387).

Pierard, S., Leroy, D., Hansen, J.-F., & Van Droogenbroeck, M. (2011). Estimation of human orientation in images captured with a range camera. In Advanced Concepts for Intelligent Vision Systems (ACIVS) (pp. 519-530). Springer. doi:10.1007/978-3-642-23687-7_47

Van Droogenbroeck, M., & Pierard, S. (2011). Object descriptors based on a list of rectangles: method and algorithm. In Soille (Ed.), International Symposium on Mathematical Morhology (ISMM) (pp. 155-165). Berlin, Germany: Springer-Verlag. doi:10.1007/978-3-642-21569-8

Pierard, S., Lejeune, A., & Van Droogenbroeck, M. (2011). A probabilistic pixel-based approach to detect humans in video streams. In International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2011) (pp. 921-924). IEEE. doi:10.1109/ICASSP.2011.5946555

Szepetiuk, G., Pierard, S., PIERARD-FRANCHIMONT, C., CAUCANAS, M., QUATRESOOZ, P., & PIERARD, G. (2011). Recent trends in specular light reflectance beyond clinical fluorescence diagnosis. European Journal of Dermatology, 21 (2), 157-61. doi:10.1684/ejd.2010.1243

Barnich, O., Pierard, S., & Van Droogenbroeck, M. (2010). A virtual curtain for the detection of humans and access control. In Advanced Concepts for Intelligent Vision Systems (ACIVS) (pp. 98-109). doi:10.1007/978-3-642-17691-3_10

Pierard, S., Lejeune, A., & Van Droogenbroeck, M. (2010). 3D information is valuable for the detection of humans in video streams. In 3D Stereo Media.

Pierard, S., Pierlot, V., Barnich, O., Van Droogenbroeck, M., & Verly, J. (2010). A platform for the fast interpretation of movements and localization of users in 3D applications driven by a range camera. In Proceedings of the 3DTV Conference (pp. 4). doi:10.1109/3DTV.2010.5506408

Devillers, C., Pierard, G., Quatresooz, P., & Pierard, S. (2010). Environmental dew point and skin and lip weathering. Journal of the European Academy of Dermatology and Venereology, 24 (5), 513-7. doi:10.1111/j.1468-3083.2009.03465.x

Pierard, S., Noel, F., Franchimont, C., Pierard, G., & Quatresooz, P. (2010). Gaïa, le stress géoclimatique et la peau. Dermo'sphère, 2, 12-13.

Quatresooz, P., PIERARD, G., FRANCHIMONT, C., Humbert, P., & Pierard, S. (2010). Introduction a l'analyse spectrale des reseaux microvasculaires du melanome cutane primitif. Pathologie Biologie, 60, 149-153. doi:10.1016/j.patbio.2010.01.001

Pierard, S., Leens, J., & Van Droogenbroeck, M. (November 2009). Real-time processing of depth and color video streams to improve the reliability of depth maps [Poster presentation]. 3D Stereo Media, Liège, Belgium.

Pierard, S., & Van Droogenbroeck, M. (2009). Techniques to improve the foreground segmentation with a 3D camera and a color camera [Paper presentation]. 20th Annual Workshop on Circuits, Systems and Signal Processing (ProRISC), Veldhoven, Netherlands.

Pierard, S., & Van Droogenbroeck, M. (2009). A technique for building databases of annotated and realistic human silhouettes based on an avatar. In Annual Workshop on Circuits, Systems and Signal Processing (ProRISC) (pp. 243-246).

Leens, J., Pierard, S., Barnich, O., Van Droogenbroeck, M., & Wagner, J.-M. (2009). Combining Color, Depth, and Motion for Video Segmentation. In Computer Vision Systems (pp. 104-113). Springer. doi:10.1007/978-3-642-04667-4_11

Pierard, S., Franchimont, C., & Pierard, G. (2009). La biodiversité, reflet des soubresauts de la biosphère et de l'équilibre géophysiologique. Association des Géologues Amateurs de Belgique Minibul, 42, 149-156.

Pierard, S. (2007). Génération automatique d'une base de données de silhouettes humaines au moyen d'un avatar humain tridimensionnel [Master’s dissertation, ULiège - Université de Liège]. ORBi-University of Liège. https://orbi.uliege.be/handle/2268/170107

Franchimont, C., Pierard, S., & Pierard, G. (2006). Impact du stress géoclimatique sur la peau. Dermatologie Actualité, 100, 22-24.

Pierard, S., Franchimont, C., & Pierard, G. (2005). Disruption endocrinienne chez les crustacés. Imputabilité des polluants organiques environnementaux. Revue Verviétoise d'Histoire Naturelle, 62, 9-14.

Pierard, S., Franchimont, C., & Pierard, G. (2002). Stress écologique et chronobiologique de la dérive géoclimatique. Revue Verviétoise d'Histoire Naturelle, 59, 43-48.

Pierard, S., Franchimont, C., & Pierard, G. (2001). Les rudistes de la Mésogée. Anatomie et biotope. Revue Verviétoise d'Histoire Naturelle, 58, 55-64.

Pierard, S., Franchimont, C., & Pierard, G. (2001). Introduction à la paléopathologie. A la source des cancers chez les dinosaures. Revue Médicale de Liège, 56, 521-522.

Pierard, S., Franchimont, C., & Pierard, G. (2000). Les Scarabées. Revue Verviétoise d'Histoire Naturelle, 57, 177-184.

Pierard, S., Franchimont, C., & Pierard, G. (2000). Les rhyncholites. Association des Géologues Amateurs de Belgique Minibul, 33, 11-13.

Pierard, S., Franchimont, C., & Pierard, G. (2000). L'appareil aptychial chez les ammonoïdes. Association des Géologues Amateurs de Belgique Minibul, 33, 204-206.

Pierard, S., Franchimont, C., & Pierard, G. (1999). Morphotypes et postures de vie et de mort chez les trilobites. Revue Verviétoise d'Histoire Naturelle, 56, 19-28.

Pierard, S., Franchimont, C., & Pierard, G. (1998). Plaidoyer pour la biodiversité au crépuscule du deuxième millénaire. Revue Verviétoise d'Histoire Naturelle, 55, 63-68.

Pierard, S., Franchimont, C., & Pierard, G. (1998). Oiseau, d'où viens-tu? Association des Géologues Amateurs de Belgique Minibul, 31 (8), 20-22.

Pierard, S., Franchimont, C., & Pierard, G. (1998). Observation de la peau d'un hadrosaure vieux de 75 millions d'années. Revue Verviétoise d'Histoire Naturelle, 55, 29-34.