%0 Journal Article %A V. I. Afanas'ev %T On functions of a random walk up to the hitting the negative half-axis %J Teoriâ veroâtnostej i ee primeneniâ %D 1986 %P 773-777 %V 31 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/TVP_1986_31_4_a9/ %G ru %F TVP_1986_31_4_a9