PolovitskiiYa. D., ChernikovN. S., and ChechulinV. L. “Groups With Incidence Condition for Noncyclic Subgroups”. Ukrains’kyi Matematychnyi Zhurnal 48, no. 4 (April 25, 1996): 533-539. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5316.