1. Analytic properties of Schmidt pairs for a Hankel operator and the generalized Schur–Takagi problem;Adamjan;Math. USSR-Sb.,1971
2. Padé Approximants;Baker,1996
3. Nevanlinna–Pick interpolation for time-varying input–output maps;Ball,1992
4. Interpolation of rational matrix functions;Ball,1990
5. V. Belevitch, Classical Network Theory, Holden-Day, San Francisco, 1968, pp. 93,136,141. (Zbl 172.204).