1.
Chernikov SN, Chernikov NS. Complementability criterion of periodical almost soluble subgroups in the group containing it. Ukr. Mat. Zhurn. [Internet]. 1992 Jul. 7 [cited 2025 Dec. 6];44(6):822-6. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/8016