TY - JOUR AU - J. Meder TI - On the Nörlund summability of orthogonal series JO - Annales Polonici Mathematici PY - 1962 SP - 231 EP - 256 VL - 12 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap-12-3-231-256/ DO - 10.4064/ap-12-3-231-256 LA - de ID - 10_4064_ap_12_3_231_256 ER -