%0 Journal Article %A G.A. Margulis %A S.G. Dani %T Values of quadratic forms at primitive integral points. %J Inventiones mathematicae %D 1989 %P 405-424 %V 98 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1989__98_1_143736/ %F IM_1989__98_1_143736