TY  - JOUR
AU  - U. Raitums
TI  - Questions of the existence of a solution in problems of optimal control of leading coefficients of linear elliptic equations
JO  - Differencialʹnye uravneniâ
PY  - 1983
SP  - 1040
EP  - 1047
VL  - 19
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1983_19_6_a14/
LA  - ru
ID  - DE_1983_19_6_a14
ER  -