%0 Journal Article %A V. G. Kopp %T Invariants of groups of infinitesimal motions of a three-dimensional Lorentz space %J Trudy Geometricheskogo Seminara %D 1986 %P 13-29 %V 17 %I mathdoc %U http://geodesic.mathdoc.fr/item/KUTGS_1986_17_a2/ %G ru %F KUTGS_1986_17_a2