1. P. S. Kazimirskii, ?Solution of the problem of finding a regular factor of a matrix polynomial,? Ukr. Mat. Zh.,32, No. 4, 483?498 (1980).
2. P. S. Kazimirskii, Decomposition of Matrix Polynomials into Factors [in Ukrainian], Naukova Dumka, Kiev (1981).
3. A. N. Malyshev, ?Factorization of matrix polynomials,? Sib. Mat. Zh.,23, No. 3, 136?146 (1982).
4. V. M. Petrichkovich, ?Linear factors and reducibility of polynomial matrices,? Ukr. Mat. Zh.,36, No. 2, 195?200 (1984).
5. I. Gohberg, P. Lancaster, and L. Rodman, Matrix Polynomials, Academic Press, New York-London (1982).