1.
Kovaleva VA. Finite groups with given systems of $K-\mathfrak{U}$-subnormal subgroups. Ukr. Mat. Zhurn. [Internet]. 2016Jan.25 [cited 2021Jan.22];68(1):52-3. Available from: http://umj.imath.kiev.ua/index.php/umj/article/view/1821