%0 Journal Article %A T. L. Shervashidze %T XIX Winter School on Probability Theory and Mathematical Statistics %J Teoriâ veroâtnostej i ee primeneniâ %D 1986 %P 427-428 %V 31 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TVP_1986_31_2_a26/ %G ru %F TVP_1986_31_2_a26