TY  - JOUR
AU  - S. G. Krein
AU  - G. I. Laptev
TI  - Boundary value problems for second order differential equations in a Banach space. I
JO  - Differencialʹnye uravneniâ
PY  - 1966
SP  - 382
EP  - 390
VL  - 2
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1966_2_3_a10/
LA  - ru
ID  - DE_1966_2_3_a10
ER  -