[1]
Koval Т. V., “Groups Proper Nonmaximal Subgroups of Which Are Cyclic or Minimal Noncyclic”,
Ukr. Mat. Zhurn.
, vol. 52, no. 12, pp. 1708–1710, Dec. 2000, Accessed: Apr. 09, 2025. [Online]. Available:
https://umj.imath.kiev.ua/index.php/umj/article/view/4574