Dzhaliuk NS, Petrychkovych VM. Equivalence of matrices in the ring $M(n, R)$ and its subrings. Ukr. Mat. Zhurn. [Internet]. 2021Dec.17 [cited 2024Nov.21];73(12):1612 -1618. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/6858