%0 Journal Article %A V. I. Arkin %T Optimality of threshold stopping times for diffusion processes %J Teoriâ veroâtnostej i ee primeneniâ %D 2020 %P 437-459 %V 65 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TVP_2020_65_3_a0/ %G ru %F TVP_2020_65_3_a0