TY  - JOUR
AU  - H. Mevissen
AU  - R. J. Nessel
TI  - On the Best Approximation of Riemann Integrable Functions by Trigonometric Polynomials
JO  - Mathematica balkanica
PY  - 1990
SP  - 289
VL  - 4
IS  - 3-4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MABA_1990_4_3-4_a6/
ID  - MABA_1990_4_3-4_a6
ER  -