TY - JOUR AU - Yu. I. Khmelevskii TI - Existence and uniqueness theorems for a class of problems with operator coefficients JO - Differencialʹnye uravneniâ PY - 1986 SP - 463 EP - 472 VL - 22 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1986_22_3_a14/ LA - ru ID - DE_1986_22_3_a14 ER -