Kaewka, K., S. Kubglomsong, and S. Arsa. “The Effects of Drying and Steeping Conditions on Phenolic Contents and Antioxidant Activities of Lotus Petal Tea”. Journal of Food Technology, Siam University, vol. 16, no. 1, Mar. 2021, pp. 78-88, https://li01.tci-thaijo.org/index.php/JFTSU/article/view/247504.