DovzhenkoS. A. and ChernikovN. S. (1999) “Primary graded groups with complementable non-Frattini subgroups”, Ukrains’kyi Matematychnyi Zhurnal, 51(10), pp. 1324–1333. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4731 (Accessed: 27July2024).