V. I. Senashov, “On groups with a strongly imbedded subgroup having an almost layer-finite periodic part”, Ukr. Mat. Zhurn., vol. 64, no. 3, pp. 384–391, Mar. 2012, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2583