Gentechev, Tsanko, and Elenka Gentcheva. “Factorizations of the Groups $PSU_{6}(q)$”. Ann. Sofia Univ. Fac. Math. and Inf. 86, no. 1 (December 12, 1994): 79–85. Accessed November 22, 2024. https://stipendii.uni-sofia.bg/index.php/fmi/article/view/441.