J.J.Verm. (J.J.Sm.) 1982 - Vermeulen JJ (1982) NEW SPECIES AND COMBINATIONS IN THE GENUS BULBOPHYLLUM THOUARS (ORCHIDACEAE). Selbyana 7(1): 20-26. Retrieved from http://www.jstor.org/stable/41759562
There is no corrections for Bulbophyllum epicranthes var. sumatranum yet.