TY - JOUR AU - S. A. Tersenov TI - An elliptical type of equation degenerating at the domain boundary JO - Doklady Akademii Nauk PY - 1957 SP - 670 EP - 673 VL - 115 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1957_115_4_a9/ LA - ru ID - DAN_1957_115_4_a9 ER -