Nguyen, Tuyet, Thu Nguyen, Hang Nguyen, Suong Nguyen, and Phung Nguyen. 2009. “OLEANANE SAPONINS FROM POLYSCIAS GUILFOYLEI BAIL. (ARALIACEAE)”. Science and Technology Development Journal 12 (10), 21-28. https://doi.org/https://doi.org/10.32508/stdj.v12i10.2295.