1. Rational approximation of functions with a convex derivative;Abdugabrov;Dokl. Acad. Nauk SSSR,1972
2. Application of approximation theory methods to recursive digital filter design;Chui;IEEE Trans. Acoust. Speech Signal Process.,1982
3. Degrees of rational approximation in digital filter realization;Chui,1985
4. Über die Approximation reeler Funktionen durch rationaler gebrochene Funktionen;Freud;Acta Math. Hungar.,1966
5. Rapidity of rational approximation of continuous functions with characteristic singularities;Gončar;Mat. Sb. (N.S.),1967