Amiri, S. S. S., A. K. Asboei, and A. Iranmanesh. “A New Characterization of PSL($2, q$) for Some $q$”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 67, no. 9, Sept. 2015, pp. 1155–1162, https://umj.imath.kiev.ua/index.php/umj/article/view/2054.