Vermeulen, J. J. 1991. “New Species of Bulbophyllum, Sections Trachyrhachis, Ischnopus and Macrouris from New Guinea (Orchidaceae)”. Rheedea 1 (1&2): 68-77. https://doi.org/10.22244/rheedea.1991.01.1-2.12.