1. , , and : Schur Functions Operator Colligations, and Reproducing Kernel Pontryagin Spaces, OT 96, Birkhäuser Verlag, Basel, 1997
2. and : On Orthogonal Matrix Polynomials. In: Topics in Interpolation Theory of Rational Matrix-Valued Functions, OT 34, p.25-46, Birkhäuser Verlag, Basel, 1988
3. and : Unitary Rational Matrix Functions. In: Topics in Operator Theory Constantin Apostol Memorial Issue, OT 33, p. 175-222, Birkhäuser Verlag, Basel, 1988
4. Inverse Spectral Problem for Differential Operators with Rational Scattering Matrix Functions
5. and : Inverse Scattering Problem for Differential Operators with Rational Scattering Matrix Functions. In: Singular Integral Operators and Related Topics, Joint Germany-Israeli Workshop, Tel-Aviv, March 1-10, 1995, OT 90, p. 1-18, Birkhäuser Verlag, Basel, 1996