TY  - JOUR
AU  - Ya. A. Roitberg
AU  - Z. G. Sheftel
TI  - Optimal control of systems described by general elliptic problems
JO  - Differencialʹnye uravneniâ
PY  - 1979
SP  - 1075
EP  - 1087
VL  - 15
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1979_15_6_a13/
LA  - ru
ID  - DE_1979_15_6_a13
ER  -