Dixon, M. R., M. J. Evans, and H. Smith. “Groups With Various Minimal Conditions on Subgroups”. Ukrains’kyi Matematychnyi Zhurnal 54, no. 6 (June 25, 2002): 780–788. Accessed February 16, 2026. https://umj.imath.kiev.ua/index.php/umj/article/view/4116.