Team, Support. “Admitting a Semihyperring With Zero of Certain Linear Transformation Subsemigroups of $L_R(V,W)$ (Part II): S. Chaopraknoi, S. Hobuntud, S. Painskool”. Thai Journal of Mathematics 6, no. 3 (December 31, 2008): 45–58. Accessed May 17, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/133.