%0 Journal Article %A Thomas C. Sideris %T The null condition and global existence of nonlinear elsastic waves. %J Inventiones mathematicae %D 1996 %P 323-342 %V 123 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1996__123_3_144349/ %F IM_1996__123_3_144349