TY  - JOUR
AU  - L. Kh. Liberman
TI  - Some problems in the theory of approximating solutions of differential-operator equations in Hilbert space
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1964
SP  - 88
EP  - 92
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1964_3_a12/
LA  - ru
ID  - IVM_1964_3_a12
ER  -