Ratchada Chattavongsin, and Jingtair Siriphanich. 1990. “Relationship Between Fruit-stem Stiffness and Maturity of ‘MONTHONG’ Durians (Durio zibethinus Murr.)”. Agriculture and Natural Resources 24 (5). Bangkok, Thailand:54-58. https://li01.tci-thaijo.org/index.php/anres/article/view/242261.