Chinh, Vu Tien, Bui Hong Quang, Nguyen The Cuong, and Tran The Bach. “Canthium Simile Merr. & Chun (Rubiaceae), a New Species for the Flora of Vietnam”. Academia Journal of Biology 31, no. 2 (May 12, 2012): 40–42. Accessed December 7, 2022. https://vjs.ac.vn/index.php/vjbio/article/view/813.