TY - JOUR AU - R. V. Guseinov TI - Spectrum of quasielliptic differential operators JO - Matematičeskie zametki PY - 1993 SP - 145 EP - 148 VL - 53 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1993_53_6_a16/ LA - ru ID - MZM_1993_53_6_a16 ER -