P. M. Gudivok, V. M. Oros, and A. V. . Roiter, “Representations of finite p-groups over the ring of formal power-mode series with integral p-addic coefficients”, Ukr. Mat. Zhurn., vol. 44, no. 6, pp. 753–765, Jul. 1992, Accessed: Apr. 09, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/8006