Kesamoon, C., and W. Witayakiattilerd. “Hierarchy Analysis Process Under Fuzzy Environment: A Positive Way of Selecting Stocks into Portfolio Under Ambiguity in Stock Information”. Science & Technology Asia, Vol. 24, no. 4, Oct. 2020, pp. 1-11, https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/173504.