* (2001): Molecular systematics of the Oncidiinae based on evidence from four DNA sequence regions: expanded circumscriptions of "Cyrtochilum, Erycina, Otoglossum", and "Trichocentrum" and a new genus (Orchidaceae).
(2): 81-93* Williams NH, Chase MW, Fulcher T, Whitten WM, 2001, Molecular systematics of the Oncidiinae based on evidence from four DNA sequence regions: expanded circumscriptions of Cyrtochilum, Erycina, Otoglossum, and Trichocentrum and a new genus (Orchidaceae).