Team, Support. “Regular Transformation Semigroups on Some Dictionary Chains: W. Mora, Y. Kemprasit”. Thai Journal of Mathematics 5, no. 3 (December 31, 2007): 87–93. Accessed May 4, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/105.