TY - JOUR AU - A. B. Antonevich TI - The index and the normal solvability of a general elliptic boundary value problem with a finite group of shifts on the boundary JO - Differencialʹnye uravneniâ PY - 1972 SP - 309 EP - 317 VL - 8 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1972_8_2_a12/ LA - ru ID - DE_1972_8_2_a12 ER -