Kurdachenko LA, Pypka AA, Semko NN. Periodic groups, whose cyclic subgroups either are ascendant or almost self-normalized . Dopov. Nac. akad. nauk Ukr. [Internet]. 2015 Oct. 28 [cited 2026 Jul. 11];(10):17-20. Available from: https://nasu-periodicals.org.ua/index.php/dp/article/view/15350