Iranmanesh, M., M. Jafarpour, and H. Aghabozorgi. “On Sperner \(\Gamma\)-(semi)hypergroups”. Communications in Mathematics and Applications 8, no. 1 (June 30, 2017): 61–68. Accessed June 16, 2025. http://www.journals.rgnpublications.com/index.php/cma/article/view/501.