TY - JOUR AU - S. Z. Levendorskii TI - Boundary value problems in a~half-space for quasielliptic pseudodifferential operators degenerating on the boundary JO - Sbornik. Mathematics PY - 1981 SP - 429 EP - 447 VL - 39 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1981_39_4_a0/ LA - en ID - SM_1981_39_4_a0 ER -