%0 Journal Article
%A A. V. Arutyunov
%T Sign-definiteness of quadratic forms of the calculus of variations
%J Doklady Akademii Nauk
%D 1992
%P 759-764
%V 326
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1992_326_5_a0/
%G ru
%F DAN_1992_326_5_a0