TY - JOUR AU - A. I. Ibragimov TI - Solvability of a mixed problem for second-order elliptic equations JO - Differencialʹnye uravneniâ PY - 1983 SP - 56 EP - 65 VL - 19 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1983_19_1_a8/ LA - ru ID - DE_1983_19_1_a8 ER -