Polovitskii, Y.D., Chernikov, N.S. and Chechulin, V.L. (1996) “Groups with incidence condition for noncyclic subgroups”, Ukrains’kyi Matematychnyi Zhurnal, 48(4), pp. 533–539. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5316 (Accessed: 5 December 2025).