Anusorn Simuen, Ronnason Chinram, and Winita Yonthanthum. “Interval-Valued Picture Fuzzy Ideals of Semigroups”. Science & Technology Asia 30, no. 1 (March 24, 2025): 117–137. accessed April 1, 2025. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/254025.