Hai, Do Van, and Duong Duc Huyen. “New Record of Species Hygrophila Episcopalis R. Ben. (R. Ben.) (Acanthaceae) for the Flora of Vietnam”. Academia Journal of Biology 34, no. 2 (June 5, 2012): 187–189. Accessed April 25, 2024. https://vjs.ac.vn/index.php/vjbio/article/view/956.