Koehler, Samantha; Amaral, Maria do Carmo Estanislau do (2004). "A taxonomic study of the South American genus Bifrenaria Lindl. (Orchidaceae)". Brittonia. 56 (4). Springer Science and Business Media LLC: 314–345. doi:10.1663/0007-196x(2004)056[0314:atsots]2.0.co;2. ISSN0007-196X.
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Koehler, Samantha; Amaral, Maria do Carmo Estanislau do (2004). "A taxonomic study of the South American genus Bifrenaria Lindl. (Orchidaceae)". Brittonia. 56 (4). Springer Science and Business Media LLC: 314–345. doi:10.1663/0007-196x(2004)056[0314:atsots]2.0.co;2. ISSN0007-196X.