1. P. S. Kazimirs’kyi and V. M. Petrychkovych, “On equivalence of polynomial matrices,” in: Theoretical and Applied Problems of Algebra and Differential Equations [in Ukrainian], Naukova Dumka, Kyiv (1977), pp. 61–66.
2. P. S. Kazimirs’kyi, Factorization of Matrix Polynomials [in Ukrainian], Naukova Dumka, Kyiv (1981).
3. L. Baratchart, “Un théorème de factorisation et son application a la représentation des systèmes cycliques causaux,” C. R. Acad. Sci. Paris, Ser. 1. Math., 295, No. 3, 223–226 (1982).
4. J. A. Dias da Silva and T. J. Laffey, “On simultaneous similarity of matrices and related questions," Lin. Alg. Its Appl., 291, 167–184 (1999).
5. V. M. Petrychkovych, “On semiscalar equivalence and the Smith normal form of polynomial matrices,” Mat. Fiz.-Mekh. Polya, 26, 13–16 (1987).