1. P. S. Kazimirs'kii and V. M. Petrichkovich, ?Equivalent polynomial matrices,? in: Theory and Applied Problems of Algebraic and Differential Equations [in Ukrainian], Naukova Dumka, Kiev (1977), pp. 61?66.
2. P. Lancaster and H. K. Wimmer, ?Zur Theorie der ?-Matrizen,? Math. Nachrichten,68, 325?330 (1975).
3. P. S. Kazimirs'kii and V. R. Zelisko, Dop. Akad. Nauk Ukr. RSR, Ser. A, No. 11, 968?970 (1976).
4. P. S. Kazimirs'kii, Expansion of Polynomial Matrices by Multipliers [in Ukrainian], Naukova Dumka, Kiev (1981).
5. J. E. Dennis, J. E. Traub, and R. P. Weber, ?The algebraic theory of matrix polynomials,? SIAM J. Numer. Anal.,13, No. 6, 831?845 (1976).