Drushlyak, M., and T. Lukashova. “Non-Periodic Groups With the Restrictions on the Norm of Cyclic Subgroups of Non-Prime Order”. Matematychni Studii 58, no. 1 (October 31, 2022): 36-44. Accessed May 2, 2024. http://www.matstud.org.ua/ojs/index.php/matstud/article/view/340.