Vo, Nga, Lien Do, Quy Pham, and Tuyet Nguyen. “Triterpenoids and Triterpenoid Saponins from Leaves of Bougainvillea Spectabilis”. VNUHCM Journal of Natural Sciences 6, no. 3 (September 30, 2022): 2306-2313. Accessed October 4, 2025. http://stdjns.scienceandtechnology.com.vn/index.php/stdjns/article/view/1197.