TY - JOUR AU - TORD GANELIUS TI - On one-sided approximation by trigonometrical polynomials JO - Mathematica Scandinavica PY - 1956 SP - 247 EP - 258 VL - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MS2_1956__4_165630/ ID - MS2_1956__4_165630 ER -