Team, Support. “On Connected Cayley Graphs of Semigroups: T. Suksumran, S. Panma”. Thai Journal of Mathematics 13, no. 3 (December 1, 2015): 641–652. Accessed April 10, 2025. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/538.