Team, Support. “On (m; N)-Regularity of Gamma-Semigroups: Thawhat Changphas”. Thai Journal of Mathematics 13, no. 1 (April 1, 2015): 137–145. Accessed April 29, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/496.