Team, Support. “Outermost-Strongly Solid Variety of Commutative Semigroups: Sorasak Leeratanavalee”. Thai Journal of Mathematics 14, no. 2 (August 1, 2016): 305–313. Accessed December 22, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/598.