Orapin Bhumibhamon, Piyanuch Naka, and Umpol Julsawad. “Cocoa Fermentation : Study of Microbiological, Physical and Chemical Changes during Cocoa Fermentation”. Agriculture and Natural Resources, vol. 27, no. 3, Sept. 1993, pp. 303-1, https://li01.tci-thaijo.org/index.php/anres/article/view/241568.