BaryshovetsP. P. “Infinite Groups With Complemented Non-Abelian Subgroups”. Ukrains’kyi Matematychnyi Zhurnal 67, no. 4 (April 25, 2015): 447-455. Accessed November 23, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1995.