TY - JOUR AU - R. M. Trigub TI - Summability of trigonometric Fourier series at $d$-points and a~generalization of the Abel--Poisson method JO - Izvestiya. Mathematics PY - 2015 SP - 838 EP - 858 VL - 79 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM2_2015_79_4_a7/ LA - en ID - IM2_2015_79_4_a7 ER -