Chernikov SN, Levishchenko SS. Constructive description of finite nondispersed groups where all subgroups of the nonprimary index are Abelian . Ukr. Mat. Zhurn. [Internet]. 1992 Jul. 7 [cited 2025 Dec. 6];44(6):818-22. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/8015