TY - JOUR AU - M. B. Dubashinskiǐ TI - On a~method of approximation by gradients JO - Algebra i analiz PY - 2013 SP - 3 EP - 36 VL - 25 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AA_2013_25_1_a0/ LA - ru ID - AA_2013_25_1_a0 ER -