Chaipanich, V. V., P. Wanachantararak, and S. Hasin. “Floral morphology and Potential Pollinator of Vanilla siamensis Rolfe ex Downie (Orchidaceae: Vanilloideae) in Thailand”. The Thailand Natural History Museum Journal, vol. 14, no. 1, June 2020, pp. 1-14, https://li05.tci-thaijo.org/index.php/thnhmj/article/view/1859.