Kozulin, S. N., V. I. Senashov, and V. P. Shunkov. “Groups With Handles of Order Different from Three”. Ukrains’kyi Matematychnyi Zhurnal 56, no. 8 (August 25, 2004): 1030–1042. Accessed May 5, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3820.