TY - JOUR AU - B. R. Vainberg AU - V. V. Grushin TI - Uniformly non-elliptic systems of singular integro-differential equations on compact manifolds JO - Doklady Akademii Nauk PY - 1967 SP - 518 EP - 520 VL - 172 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1967_172_3_a2/ LA - ru ID - DAN_1967_172_3_a2 ER -