%0 Journal Article %A R. A. Sarkisyan %T On differential invariants of geometric structures %J Izvestiya. Mathematics %D 2006 %P 307-362 %V 70 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2006_70_2_a4/ %G en %F IM2_2006_70_2_a4