TY  - JOUR
AU  - A. V. Arutyunov
TI  - Sign-definiteness of quadratic forms of the calculus of variations
JO  - Doklady Akademii Nauk
PY  - 1992
SP  - 759
EP  - 764
VL  - 326
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1992_326_5_a0/
LA  - ru
ID  - DAN_1992_326_5_a0
ER  -