TY - JOUR AU - A. L. Skubachevskii TI - On the spectrum of some nonlocal elliptic boundary value problems JO - Sbornik. Mathematics PY - 1983 SP - 543 EP - 553 VL - 45 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1983_45_4_a9/ LA - en ID - SM_1983_45_4_a9 ER -