Nazarova, L. A., and Rоіter A. V. “On Irreducible Representations of the $p$-Group on $Z_p$”. Ukrains’kyi Matematychnyi Zhurnal, vol. 18, no. 1, Jan. 1966, pp. 119-24, https://umj.imath.kiev.ua/index.php/umj/article/view/8662.