TY - JOUR AU - A. I. Yanushauskas TI - On the well-posed property of boundary value problems for multidimensional equations of mixed type JO - Doklady Akademii Nauk PY - 1981 SP - 834 EP - 836 VL - 257 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1981_257_4_a14/ LA - ru ID - DAN_1981_257_4_a14 ER -