%0 Journal Article
%A L. B. Rapoport
%T Sign-definiteness of a quadratic form under quadratic constraints
%J Doklady Akademii Nauk
%D 1988
%P 822-826
%V 298
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1988_298_4_a11/
%G ru
%F DAN_1988_298_4_a11