%0 Journal Article %A S. V. Vinnichenko %A V. V. Mazalov %T Optimal stopping of observations in problems of the control of random walks %J Teoriâ veroâtnostej i ee primeneniâ %D 1990 %P 669-676 %V 35 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/TVP_1990_35_4_a3/ %G ru %F TVP_1990_35_4_a3