1. C. Bennett, K. Rudnick, and J. D. Vaaler, Best uniform approximation by linear fractional transformations, to appear.
2. Approximation of Functions: Theory and Numerical Methods;Meinardus,1967
3. Nicht-lineare Approximationen;Meinardus;Arch. Rational Mech. Anal.,1964
4. Interpolation and Approximation by Rational Functions in the Complex Domain;Walsh,1969