Sudirman, Sabri, et al. “In Vitro Inhibitory HMG-CoA Reductase Activity of Purified Polyphenol Compounds from Water Lettuce (Pistia Stratiotes) Leaf Extract: doi.org 10.26538 Tjnpr V6i7.15”. Tropical Journal of Natural Product Research (TJNPR), vol. 6, no. 7, July 2022, pp. 1131-4, https://tjnpr.org/index.php/home/article/view/1438.