Linh, Nguyen Thi Thuy, 		Tam, Khieu, 		Thang, Pham, 		Cham, Ba, 		Tam, Nguyen, AND 		Anh, Nguyen.
" Further Results about Chemical Constituents of Heterostemma grandiflorum Cost." <em>VNU Journal of Science: Natural Sciences and Technology</em> [Online], Volume 38 Number 2 (23 June 2022)