Bondarenko, V. M., and M. Yu. Bortos. “Indecomposable and Isomorphic Objects in the Category of Monomial Matrices over a Local Ring”. Ukrains’kyi Matematychnyi Zhurnal, vol. 69, no. 7, July 2017, pp. 889-04, https://umj.imath.kiev.ua/index.php/umj/article/view/1744.