TY - JOUR AU - V. V. Zhuk AU - O. A. Tumka TI - On some modifications of Jackson's generalized theorem for the best approximations of periodic functions JO - Vestnik Sankt-Peterburgskogo universiteta. Prikladnaâ matematika, informatika, processy upravleniâ PY - 2014 SP - 40 EP - 50 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VSPUI_2014_1_a4/ LA - ru ID - VSPUI_2014_1_a4 ER -