Ratchadaporn Thongheam, Aunchulee Thongjub, Wanna Malaphan, and Patoomporn Chim–anage. 2008. “Probiotic Production by Mixed Culture of Lactic Acid Bacteria and Yeast”. Agriculture and Natural Resources 42 (5). Bangkok, Thailand:277-84. https://li01.tci-thaijo.org/index.php/anres/article/view/244607.