TY - JOUR AU - V. I. Volkov TI - On conditions for convergence of sequences of linear positive operators in the space of continuous functions assigned on closed surfaces JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1960 VL - 15 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1960_15_1_a8/ LA - ru ID - RM_1960_15_1_a8 ER -