Bilotskii NN, Baryshovets PP. On groups with a small number of classes of conjugate noncomplemented subgroups. Ukr. Mat. Zhurn. [Internet]. 2010Oct.25 [cited 2024Dec.4];62(10):1420–1427. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2966