Ikrawan, Yusep, Siree Chaiseri, and Orawan Vungdeethum. 1997. “Effect of Fermentation Time on Pyrazine Concentration of Thai Forasero Beans”. Agriculture and Natural Resources 31 (4). Bangkok, Thailand:479-87. https://li01.tci-thaijo.org/index.php/anres/article/view/241002.