V. M. Prokip, “To the problem of multiplicativity of canonical diagonal forms of matrices over the domain of principal ideals”, Ukr. Mat. Zhurn., vol. 47, no. 11, pp. 1581–1584, Nov. 1995, Accessed: Apr. 07, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5551