TY  - JOUR
AU  - S. R. Umarov
TI  - Nonlocal boundary value problems for pseudodifferential and operator-differential equations.~I
JO  - Differencialʹnye uravneniâ
PY  - 1997
SP  - 827
EP  - 836
VL  - 33
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1997_33_6_a16/
LA  - ru
ID  - DE_1997_33_6_a16
ER  -