Ngoc, Hieu N., et al. “Evaluation of α-Amylase Inhibitory Activity of Saponins from Panax Bipinnatifidus Seem. Growing in Vietnam: Http: www.doi.org 10.26538 Tjnpr V7i8.27”. Tropical Journal of Natural Product Research (TJNPR), vol. 7, no. 8, Aug. 2023, pp. 3756-60, https://tjnpr.org/index.php/home/article/view/2447.