Strong and best approximation of Fourier series and the Lipschitz classes L. Leindler OriginalPaper Pages: 101 - 116
On the modulus of continuity in connection with a problem of J. Szabados concerning strong approximation V. Totik OriginalPaper Pages: 145 - 152
A note on approximation to the identity with iterated kernels Felipe J. Zó OriginalPaper Pages: 153 - 158