Lekkoksung, Nareupanat, Hataikhan Sanpan, and Somsak Lekkoksung. “Characterizations of Some Regularities in Ordered Ternary Semigroups in Terms of Fuzzy Subsets”. Communications in Mathematics and Applications 12, no. 2 (June 30, 2021): 325–333. Accessed May 1, 2024. https://www.rgnpublications.com/journals/index.php/cma/article/view/1489.