Rucksakaew, K., T. Damsud, and W. Chankaew. “Flavonoid Effects of Water Extraction on Total Flavonoid Content and Biological Activities Between Natural and Cultured Wolffia Globosa (Roxb.) Hartog & Plas”. Princess of Naradhiwas University Journal, vol. 12, no. 1, July 2019, pp. 185-93, https://li01.tci-thaijo.org/index.php/pnujr/article/view/196987.