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Conservatoire botanique national des Pyrénées et de Midi-Pyrénées

Tan, B., Geissler, P., Hallingbäck, T., Söderström, L., 2000 . The 2000 IUCN world red list of Bryophytes. In: Mosses, liverworts and hornworts : status survey and conservation action plan for bryophytes. IUCN (international union for conservation of nature and natural resources), [S.l.]: 77-90.