PEARCE, N. et al. 2001. NOTES RELATING TO THE FLORA OF BHUTAN: XLIV. TAXONOMICNOTES, NEW TAXA AND ADDITIONS TO THE ORCHIDACEAE OF BHUTAN AND SIKKIM (INDIA). Edinburgh Journal of Botany. 58, 1 (Feb. 2001), 99–122. DOI:https://doi.org/10.1017/S0960428601000488.