%0 Journal Article %A Y.-C. LU %T Sufficiency of Jets in Jr (2,1) via Decomposition %J Inventiones mathematicae %D 1970 %P 119-127 %V 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1970__10_142026/ %F IM_1970__10_142026