%0 Journal Article %A A. A. Novikov %A T. L. Shervashidze %T The Twenty-First School-Colloquium on Probability Theory and Mathematical Statistics %J Teoriâ veroâtnostej i ee primeneniâ %D 1988 %P 212-213 %V 33 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TVP_1988_33_1_a30/ %G ru %F TVP_1988_33_1_a30