TY - JOUR AU - A. V. Borodin TI - An estimate for second-order partial differential equations and its application JO - Differencialʹnye uravneniâ PY - 1978 SP - 12 EP - 21 VL - 14 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1978_14_1_a1/ LA - ru ID - DE_1978_14_1_a1 ER -