1. Erweiterungen der Approximationssätze von Jackson im Sinne von C. Müntz;Golitschek;J. Approximation Theory,1970
2. Lineare Approximation durch komplexe Exponentialsummen;Golitschek;Math. Z.,1976
3. Jackson's theorem for polynomials and exponential sums with restricted coefficients;Golitschek,1978
4. J. H. B. Kemperman and G. G. Lorentz, Bounds for incomplete polynomials, preprint.
5. Approximation by incomplete polynomials (problems and results);Lorentz,1977