Gudivok , P. M., F. G. Vashchuk, and V. S. Drobotenko. 1992. “Chernikov’s P-Groups and Integral P-Adic Representations of Finite Groups ”. Ukrains’kyi Matematychnyi Zhurnal 44 (6): 742-53. https://umj.imath.kiev.ua/index.php/umj/article/view/8005.