%0 Journal Article %A A. Yu. Neronov %T Symmetries of Einstein equations. An approach using the formal theory of Lie pseudogroups %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2000 %P 3-8 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2000_6_a0/ %G ru %F VMUMM_2000_6_a0