Gudivok, P. M., & Pogorilyak, E. Y. (2002). Matrix Representations of Finite $p$-Groups over Commutative Local Rings of Characteristic $p^s$. Ukrains’kyi Matematychnyi Zhurnal, 54(6), 764-770. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/4114