Meemak, T., J. Daduang, and P. Boonsiri. “Equol: A Phytoestrogen from Soy Bean: Its Roles in Health”. Ramathibodi Medical Journal, vol. 39, no. 2, June 2016, pp. 132-41, https://he02.tci-thaijo.org/index.php/ramajournal/article/view/57629.