Atthirawong, Walailak. “Application of TOPSIS Method to Green Supplier Selection for a Thai OTOP Producer”. CURRENT APPLIED SCIENCE AND TECHNOLOGY 20, no. 1 (January 23, 2020): 144–155. accessed September 24, 2026. https://li01.tci-thaijo.org/index.php/cast/article/view/236560.