Spence, J.R. 2020.

Studies in Austral Bryaceae (Bryopsida) I. New Combinations in Ptychostomum Hornsch. from southern South America

. Phytotaxa. 437, 2 (Mar. 2020), 60–65. DOI:https://doi.org/10.11646/phytotaxa.437.2.2.