TY  - JOUR
AU  - A. Langenbach
TI  - On the application of the variation principle to some nonlinear differential equations
JO  - Doklady Akademii Nauk
PY  - 1958
SP  - 214
EP  - 217
VL  - 121
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1958_121_2_a4/
LA  - ru
ID  - DAN_1958_121_2_a4
ER  -