TY - JOUR AU - S. G. Krein AU - G. I. Laptev TI - Correctness of boundary value problems for a differential equation of the second order in a Banach space. II JO - Differencialʹnye uravneniâ PY - 1966 SP - 919 EP - 926 VL - 2 IS - 7 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1966_2_7_a5/ LA - ru ID - DE_1966_2_7_a5 ER -