Thanh Tung, Bui, 		Ky Duyen, Duong, AND 		Nhat, Bui.
" Evaluating the Antioxidant and Xanthine Oxidase Enzyme Inhibitory Activities in vitro of Piper betle Linn. Leaf Extract" <em>VNU Journal of Science: Medical and Pharmaceutical Sciences</em> [Online], Volume 36 Number 2 (24 June 2020)