TY - JOUR AU - E. N. Gersht TI - A generalization of Ljapunov's first theorem on stability to certain classes of differential equations in a Banach space JO - Differencialʹnye uravneniâ PY - 1969 SP - 833 EP - 847 VL - 5 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1969_5_5_a4/ LA - ru ID - DE_1969_5_5_a4 ER -