Phongyuth Nualbunruang, Wanchai De-Ehnamkul, and Sanha Panichajakul. 1994. “Plant Regeneration from Callus of Soybean (Glycine Max L.)”. Agriculture and Natural Resources 28 (4). Bangkok, Thailand:512-17. https://li01.tci-thaijo.org/index.php/anres/article/view/241454.