TY  - JOUR
AU  - D. M. Fage
TI  - Approximate solution of a nonlinear problem with constraint for a two- dimensional elliptic equation
JO  - Doklady Akademii Nauk
PY  - 1980
SP  - 531
EP  - 534
VL  - 255
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1980_255_3_a2/
LA  - ru
ID  - DAN_1980_255_3_a2
ER  -