1. Approximation by Bernstein type rational functions;Balázs;Acta Mathematica Academiae Scientiarum Hungarica,1975
2. Approximation by Bernstein type rational functions. II;Balázs;Acta Mathematica Academiae Scientiarum Hungarica,1982
3. Approximation with operators of K. Balázs;Alkemade;Delft Progress Report,1983
4. On Bernstein type rational functions of two variables;Atakut;Mathematica Slovaca,2004
5. Asymptotic approximation by the operators of K. Balázs and Szabados;Abel;Acta Scientiarum Mathematicarum (Szeged),2000