Agresti A, Coull BA (1998) Approximate is better than "exact" for interval estimation of binomial proportions. Am Stat Assoc 52: 119-126.
Arnhem E (2008) Eco-ethological response of great apes and other rainforest mammals to selective logging in Cameroon. Ph. D. Thesis, Université Libre de Bruxelles, Belgique.
Blom A, Almas A, Heitko IMA et al (2001) A survey of the apes in the Dzanga-Ndoki National Park, Central African Republic: a comparison between the census and survey methods of estimating the gorilla (Gorilla gorilla gorilla) and chimpanzee (Pan troglodytes) nest group density. Afr J Ecol 39: 98-106.
Brugiere D, Sakom D (2001) Population density and nesting behaviour of lowland gorillas (Gorilla gorilla gorilla) in the Ngotto forest, Central African Republic. J Zool 255: 251-259. doi: 10. 1017/S0952836901001315.
Buckland ST, Anderson DR, Burnham KP et al (2001) Introduction to distance sampling. Oxford University Press, Oxford, p 448.
Clark CJ, Poulsen JR, Malonga R, Elkan PW (2009) Logging concessions can extend the conservation estate for Central African tropical forests. Conserv Biol 23: 1281-1293. doi: 10. 1111/j. 1523-1739. 2009. 01243. x.
De Wasseige C, Devers D, de Marcken P et al (2009) Les Forêts du Bassin du Congo-Etat des Forêts 2008. In: de Wasseige C, Devers D, de Marcken P et al (eds) Les Forêts du Bassin du Congo-Etat des Forêts 2008. Office des publications de l'Union européenne, p 426.
De Wasseige C, De Marcken P, Bayol N et al (2012) Les forêts du bassin du Congo-Etat des Forêts 2010. doi: 10. 2788/48830.
Demarquez B, Jeanmart P (2004) Plan d'aménagement de la Concession Forestière sous Aménagement Durable de la société Thanry-CEB.
Devos C, Sanz C, Morgan D et al (2008) Comparing ape densities and habitats in northern Congo: surveys of sympatric gorillas and chimpanzees in the Odzala and Ndoki regions. Am J Primatol 70: 439-451. doi: 10. 1002/ajp. 20514.
Doran-Sheehy DM, Greer D, Mongo P, Schwindt D (2004) Impact of ecological and social factors on ranging in western gorillas. Am J Primatol 64: 207-222. doi: 10. 1002/ajp. 20075.
Doucet J-L (2003) L'alliance délicate de la gestion forestière et de la biodiversité dans les forêts du centre du Gabon. Ph. D. thesis, Faculté Universitaire des Sciences Agronomiques de Gembloux, Belgique.
Dupuy B (1998) Base pour une sylviculture en forêt dense humide africaine. Série FORAFRI, Document 4. CIRAD-Forêt, Montpellier, France.
Eba'a Atyi R, Devers D, De Wasseige C, Maisels F (2010) Etat des forêts d'Afrique Centrale: synthèse sous-régionale. Les forêts du Bassin du Congo Etat des forêts 2008. COMIFAC, pp 17-44.
Furuichi T, Inagaki H, Angoue-Ovono S (1997) Population density of chimpanzees and gorillas in the Petit Loango Reserve, Gabon: employing a new method to distinguish between nests of the two species. Int J Primatol 18(6): 1029-1046.
Goldsmith ML (1999) Ecological constraints on the foraging effort of western gorillas (Gorilla gorilla gorilla) at Bai Hokou, Central African Republic. Int J Primatol 20: 1-23.
Grossmann F, Hart JA, Vosper A, Ilambu O (2008) Range occupation and population etimates of bonobos in the Salonga Nationa Park: application to large-scale surveys of bonobos in the Democratic Republic of Congo. In: Furuichi T, Thompson J (eds) The bonobos. Springer, New York, pp 189-213.
Harcourt AH (1996) Is the gorilla a threatened species. How shold we judge? Biol Conserv 75: 165-176.
Harris RB, Burnham KP (2001) Estimating wildlife densities from line transect surveys. Acta Zool Sin 48: 812-818.
Hashimoto C (1995) Population census of the chimpanzees in the Kalinzu Forest, Uganda: comparison between methods with nest counts. Primates 36: 477-488.
Haurez B, Petre C, Doucet J (2013) Impacts of logging and hunting on western lowland gorilla (Gorilla gorilla gorilla) populations and consequences for forest regeneration. A review. Biotechnol Agron Soc Environ 17: 364-372.
Hicks TC, Fouts RS, Fouts DH (2009) A Survey of chimpanzees (Pan troglodytes troglodytes) and gorillas (Gorilla gorilla gorilla) in the selectively logged Ngotto Forest, Central African Republic. J Appl Anim Welf Sci 12: 165-188. doi: 10. 1080/10888700902955872.
Huijbregts B, De Wachter P, Sosthène L et al (2003) Ebola and the decline of Gorilla Gorilla gorilla and chimpanzee Pan troglodytes populations in Minkebe Forest, north-eastern Gabon. Oryx 37: 1-7. doi: 10. 1017/S0030605302000000.
Johns AD (1985) selective logging and wildlife conservation in tropical rain-forest: problems and recommendations. Biol Conserv 31: 355-375.
Kühl H, Maisels F, Ancrenaz M, Williamson EA (2009) Lignes directrices pour de meilleures pratiques en matière d' inventaire et de suivi des populations de grands singes. Document occasionnel de la Commission de la sauvegarde des espèces de l'UICN, p 36.
Laing SE, Buckland ST, Burn RW et al (2003) Dung and nest surveys: estimating decay rates. J Appl Ecol 40: 1102-1111.
Latour S (2010) Réserve de Faune du Dja: Evaluation du statut des grands singes et formation du personnel aux méthodes de monitoring des grands mammifères.
Laurance WF, Croes BM, Tchignoumba L et al (2006) Impacts of roads and hunting on central African rainforest mammals. Conserv Biol 20: 1251-1261. doi: 10. 1111/j. 1523-1739. 2006. 00420. x.
Malcolm JR, Ray JC (2000) Influence of timber extraction routes on central African small-mammal communities, forest structure, and tree diversity. Conserv Biol 14: 1623-1638.
Martin D, Chatelin Y, Collinet J et al (1981) Les sols du Gabon. Pédogenèse, répartition et aptitudes. Paris, France, Orstom, p 74.
Matthews A, Matthews A (2004) Survey of gorillas (Gorilla gorilla gorilla) and chimpanzees (Pan troglodytes troglodytes) in Southwestern Cameroon. Primates 45: 15-24. doi: 10. 1007/s10329-003-0058-4.
Medjibe VP, Putz FE, Romero C (2013) Certified and uncertified logging concessions compared in Gabon: changes in stand structure, tree species, and biomass. Environ Manage 51: 524-540. doi: 10. 1007/s00267-012-0006-4.
Morgan D, Sanz C (2007) Best practice guidelines for reducing the impact of commercial logging on great apes in Western Equatorial Africa. IUCN. doi: 10. 2305/IUCN. CH. 2007. SSC-OP. 34. en.
Morgan D, Sanz C, Onononga JR, Strindberg S (2006) Ape abundance and habitat use in the Goualougo Triangle, Republic of Congo. Int J Primatol 27: 147-179. doi: 10. 1007/s10764-005-9013-0.
Morgan D, Sanz C, Greer D et al (2013) Great Apes and FSC: implementing "ape friendly" practices in central Africa' s logging concessions. IUCN.
Moupela C, Doucet J, Daïnou K et al (2013) Dispersal and predation of diaspores of Coula edulis Baill. in an evergreen forest of Gabon. Afr J Ecol. doi: 10. 1111/aje. 12089.
Nasi R, Billand A, van Vliet N (2012) Managing for timber and biodiversity in the Congo Basin. For Ecol Manag 268: 103-111. doi: 10. 1016/j. foreco. 2011. 04. 005.
Neu CW, Byers CR, Peek JM (1974) A technique for analysis of utilization-availability data. J Wildl Manag 38: 541-545.
Oates JF (1996) Habitat alteration, hunting and the conservation of folivorous primates in African forests. Aust J Ecol 21: 1-9.
Petre C, Tagg N, Haurez B et al (2013) Role of the western lowland gorilla (Gorilla gorilla gorilla) in seed dispersal in tropical forests and implications of its decline. Biotechnol Agron Soc Environ 17: 517-526.
Poulsen JR, Clark CJ (2004) Densities, distributions, and seasonal movements of gorillas and chimpanzees in swamp forest in northern Congo. Int J Primatol 25: 285-306. doi: 10. 1023/B: IJOP. 0000019153. 50161. 58.
Poulsen JR, Clark CJ (2012) Building partnerships for conservation. In: Poulsen JR, Clark CJ (eds) Tropical forest conservation and industry partnership: an experience from the Congo. Basin, Wildlife C. Wiley, New York, pp 21-62.
Putz FE, Sist P, Fredericksen T, Dykstra D (2008) Reduced-impact logging: challenges and opportunities. For Ecol Manag 256: 1427-1433. doi: 10. 1016/j. foreco. 2008. 03. 036.
R Development Core Team (2011) R: a language and environment for statistical computing. R Found Stat Comput 1: 409. doi: 10. 1007/978-3-540-74686-7.
Rainey HJ, Iyenguet FC, Malanda GAF et al (2009) Survey of raphia swamp forest, Republic of Congo, indicates high densities of critically endangered western lowland gorillas Gorilla gorilla gorillá. Oryx 44: 124-132. doi: 10. 1017/S003060530999010X.
Remis MJ, Kpanou JB (2010) Primate and ungulate abundance in response to multi-use zoning and human extractive activities in a central African Reserve. Afr J Ecol 49: 70-80.
Rieu L, Binot A (2006) "Des agoutis entre les sapellis..." La faune sauvage dans l'aménagement des forêts d'Afrique Centrale. In: Nasi R, Nguinguiri J-C, Ezzine de Blas D (eds) Exploit. Gest. durable des forêts en Afrique Cent. la quête la durabilité, Editions L. Paris, pp 267-298.
Rogers ME, Voysey BC, McDonald KE et al (1998) Lowland gorillas and seed dispersal: the importance of nest sites. Am J Primatol 45: 45-68. doi: 10. 1002/(SICI)1098-2345(1998)45: 1<45:: AID-AJP5>3. 0. CO;2-W.
Sanz C, Morgan D, Strindberg S, Onononga JR (2007) Distinguishing between the nests of sympatric chimpanzees and gorillas. J Appl Ecol 44: 263-272. doi: 10. 1111/j. 1365-2664. 2007. 01278. x.
Serckx A (2014) Eco-ethology of a population of bonobos (Pan paniscus) living in the western forest-savannah mosaics of the Democratic Republic of Congo. Ph. D. thesis, Université de Liège, Belgique.
Spehar SN, Mathewson PD, Nuzuar et al (2010) Estimating orangutan densities using the standing crop and marked nest count methods: lessons learned for conservation. Biotropica 42: 748-757.
Stokes EJ, Strindberg S, Bakabana PC et al (2010) Monitoring great ape and elephant abundance at large spatial scales: measuring effectiveness of a conservation landscape. PLoS One 5: e10294. doi: 10. 1371/journal. pone. 0010294.
Tagg N, Willie J (2013) The influence of transect use by local people and reuse of transects for repeated surveys on nesting in western lowland gorillas (Gorilla gorilla gorilla) and central chimpanzees (Pan troglodytes troglodyte s) in southeast Cameroon. Int J Primatol 54: 554-570. doi: 10. 1007/s10764-013-9681-0.
Tagg N, Willie J, Petre C-A, Haggis O (2013) Ground night nesting in chimpanzees: new Insights from central chimpanzees (Pan troglodytes troglodytes) in South-East Cameroon. Folia Primatol 84: 362-383. doi: 10. 1159/000353172.
Thomas L, Buckland ST, Rexstad EA et al (2010) Distance software: design and analysis of distance sampling surveys for estimating population size. J Appl Ecol 47: 5-14. doi: 10. 1111/j. 1365-2664. 2009. 01737. x.
Tutin CEG, Parnell RJ, White ILJT, Fernandez M (1995) Nest building by lowland gorillas in the Lop Reserve, Gabon: environmental influences and implications for censusing. Int J Primatol 16: 53-76.
van Kreveld A, Roerhorst I (2009) Great apes and logging. WorldWide Fund, Zeist.
van Vliet N, Nasi R (2008) Mammal distribution in a central African logging concession area. Biodivers Conserv 17: 1241-1249. doi: 10. 1007/s10531-007-9300-5.
Varman KS, Sukumar R (1995) The line transect method for estimating densities of large mammals in a tropical deciduous forest: an evaluation of models and field experiments. J Biosci 20: 273-287. doi: 10. 1007/BF02703274.
Voysey BC, Mcdonald KE, Rogers ME et al (1999) Gorillas and seed dispersal in the Lope Reserve, Gabon. II: survival and growth of seedlings. J Trop Ecol 15: 39-60.
Walsh PD, Abernethy KA, Bermejo M et al (2003) Catastrophic ape decline in western equatorial Africa. Nature 422: 611-614. doi: 10. 1038/nature01472. 1.
Walsh PD, Tutin CEG, Oates JF et al (2008) Gorilla gorilla. IUCN 2012 IUCN red list threat species version 20122 1-10.
White F (1986) La végétation de l'Afrique. Orstom-Unesco, Paris.
White LJT, Edwards A (2000) Conservation research in the African rain forests. Wildlife Conservation Society, New York.
Willie J, Petre C, Tagg N, Lens L (2012) Density of herbaceous plants and distribution of western gorillas in different habitat types in south-east Cameroon. Afr J Ecol 51: 111-121.
Willie J, Tagg N, Petre C-A et al (2014) Plant selection for nest building by western lowland gorillas in Cameroon. Primates 55: 41-49. doi: 10. 1007/s10329-013-0363-5.
Wright SJ (2003) The myriad consequences of hunting for vertebrates and plants in tropical forests. Perspect Plant Ecol Evol Syst 6: 73-86.
