TY  - JOUR
AU  - I. M. Lavrent'ev
TI  - On the variational theory of nonlinear equations
JO  - Doklady Akademii Nauk
PY  - 1966
SP  - 284
EP  - 286
VL  - 166
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1966_166_2_a6/
LA  - ru
ID  - DAN_1966_166_2_a6
ER  -