TY - JOUR AU - K. V. Valikov TI - Nonlinear differential equations in a Banach space, close to linear ones JO - Differencialʹnye uravneniâ PY - 1967 SP - 1692 EP - 1706 VL - 3 IS - 10 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1967_3_10_a6/ LA - ru ID - DE_1967_3_10_a6 ER -