Kozulin, S. N., Senashov, V. I., & Shunkov, V. P. (2006). On Frobenius groups with noninvariant factor SL 2(3). Ukrains’kyi Matematychnyi Zhurnal, 58(6), 765–777. https://umj.imath.kiev.ua/index.php/umj/article/view/3494