1. English transl. in: Interpolation Theory, Systems Theory and Related Topics - The Harry Dym Anniversary Volume, edited by D. Alpay, I. Gohberg, and V. Vinnikov, Operator Theory: Advances and Applications Vol. 134 (Birkhäuser Verlag, Basel - Boston - Berlin, 2002), pp. 99-136.
2. Stable dissipative linear stationary dynamical scattering systems, Appendix I: Further Developments, English transl. in: Interpolation Theory, Systems Theory and Related Topics - The Harry Dym Anniversary Volume, edited by D. Alpay, I. Gohberg, and V. Vinnikov, Operator Theory: Advances and Applications Vol. 134 (Birkhäuser Verlag, Basel - Boston - Berlin, 2002), pp. 128-129.