ANDREWS A.L., 1945 - Taxonomic notes. V. The genus Tetrapterum. The Bryologist 48: 190-193.
BLOCKEEL T. & LONG D.G., 1998 - A Check-List and Census Catalogue of British and Irish Bryophytes. Cardiff, British Bryological Society.
COLACINO C. & MISHLER B.D., 1996 - Preliminary results from ITS sequence data analysis in the genus Syntrichia (Musci: Pottiaceae). American Journal of Botany Suppl. 83: 8.
CORLEY M.F.V., CRUNDWELL A.C., DULL R., HILL M.O. & SMITH A.J.E., 1981 - Mosses of Europe and the Azores; an annotated list of species, with synonyms from the recent literature. Journal of Bryology 11: 609-689.
CRUM H.A. & ANDERSON L.E., 1981 - Mosses of Eastern North America. New York, Columbia University Press.
DEMARET F. & CASTAGNE E., 1964 - Flore Générale de Belgique. Bryophytes. Vol. 2. Fasc. 3. Brussels, Jardin Botanique National de Belgique.
FRAHM J.P., 1994 - Tortula densa (Musci, Pottiaceae), eine übersehene Sippe aus dem Tortula ruralis Komplex. Fragmenta Floristica et Geobotanica 39: 391-399.
KRAMER W, 1980 - Tortula Hedw. Sect. Rurales De Not. (Pottiaceae, Musci) in der Östlichen Holarktis. Bryophytorum Bibliotheca 21.
LAMBINON J., DE LANGHE J.E., DELVOSALLE L., DUVIGNEAUD J. (and coll.), 1993 -Nouvelle Flore de la Belgique, du Grand-Duché de Luxembourg, du Nord de la France et des Régions voisines (Ptéridophytes et Spermatophytes). 4th. ed. Meise, Jardin Botanique National de Belgique.
MISHLER B.D., 1984 - Systematic studies in the genus Tortula (Musci: Pottiaceae). Ph. D. dissertation, Harvard University.
MISHLER B.D., 1985 - Biosystematic studies of the Tortula ruralis complex. I. Variation of taxonomic characters in culture. Journal of the Hattori Botanical Laboratory 58: 225-253.
NYHOLM E. 1989 - Illustrated Flora of Nordic Mosses. Fasc. 2. Pottiaceae-Splachnaceae. Schistostegaceae. Copenhagen and Lund, Nordic Bryological Society.
SMITH A.J.E., 1978 - The Moss Flora of Great Britain and Ireland. Cambridge, Cambridge University Press.
SOTIAUX A., SOTIAUX O., VANDERPOORTEN A. & DURWAEL L., 2000 - The distribution of the bryoflora in the Forest of Soignes. Scripta Botanica Belgica 18: 1-83.
TOUW A. & RUBERS W.V., 1989 - De Nederlandse Bladmossen. Utrecht, Stichting Uitgeverij Koninklijke Nederlandse Natuurhistorische Vereniging.
VANDERPOORTEN A., 1997 - A bryological survey of the Brussels-Capital Region. Scripta Botanica Belgica 14: 1-83.
VANDERPOORTEN A., STIEPERAERE H. & SOTIAUX A., 2001 - Une révision critique de la distribution de Tortula inermis en Belgique. Dumortiera, sous presse.
WERNER J., 1999 - Première mise à jour critique de la check-list des bryophytes du Grand-Duché de Luxembourg. Lejeunia N.S. 161: 1-25.
ZANDER R.H., 1993 - Genera of the Pottiaceae: mosses of harsh environments. Bulletin of the Buffalo Society of Natural Sciences 32: 1-378.
