1. Alpay, D. and Gohberg, I.: On orthogonal matrix polynomials, Operator Theory: Advances and Applications, this issue.
2. Atzmon, A.: n-orthonormal operator polynomials, Operator Theory: Advances and Applications, this issue.
3. Ball, J.A. and Ran, A.C. M.: Local inverse problems for rational matrix functions, Integral Equations and Operator Theory, 10 (1987), 349–415.
4. Ben-Artzi, A. and Gohberg, I: Extension of a theorem of Krein on orthogonal polynomials for the non-stationary case, this issue.
5. Clancey, K. and Gohberg, I.: Factorization of matrix functions and singular integral operators. Operator Theory: Advances and Applications, Vol. 3., Birkhäuser Verlag, Basel, 1981.