Kurdachenko, L. A., A. A. Pypka, and N. N. Semko. “Periodic Groups, Whose Cyclic Subgroups Either Are Ascendant or Almost Self-Normalized”. Reports of the National Academy of Sciences of Ukraine, no. 10 (February 8, 2025): 17–20. Accessed August 13, 2025. https://nasu-periodicals.org.ua/index.php/dp/article/view/15350.