Xuyen, Do, Phuong, Vu, Hoan, Ha, AND Duc, Nguyen. " Genus Opithandra B. L. Burtt and Species Opithandra Dinghushanensis W. T. Wang as New Records for the Flora of Vietnam from Bac Huong Hoa Nature Reserve, Quang Tri Province" VNU Journal of Science: Natural Sciences and Technology [Online], Volume 32 Number 1S (15 March 2016)