Kesamoon, Chainaraong, and Wichai Witayakiattilerd. “Hierarchy Analysis Process Under Fuzzy Environment: A Positive Way of Selecting Stocks into Portfolio Under Ambiguity in Stock Information”. Science & Technology Asia 24, no. 4 (October 14, 2020): 1-11. Accessed November 29, 2020. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/173504.