1. Theory of Approximation;Achieser,1956
2. A Szegő theory for rational functions;Bultheel,1990
3. Orthogonal rational functions similar to Szegő polynomials;Bultheel,1991
4. Orthogonality and quadrature on the unit circle;Bultheel,1991
5. Orthogonal rational functions and quadrature on the unit circle;Bultheel;Numer. Algorithms,1992