1.
Monakhov VS, Konovalova MN. On groups with formational subnormal strictly 2-maximal subgroups. Ukr. Mat. Zhurn. [Internet]. 2021Jan.22 [cited 2022Aug.18];73(1):107 -116. Available from: http://umj.imath.kiev.ua/index.php/umj/article/view/1115