Angela, Nengpilhing, Krishna Chowlu, Bishwajit H. Sharma, Nageswara A. Rao, and Suraj P. Vij. 2015. “Anatomy of Some Terete-Leaved Orchid Species”. Agriculture and Natural Resources 49 (1). Bangkok, Thailand:13-21. https://li01.tci-thaijo.org/index.php/anres/article/view/243514.