%0 Journal Article %A D. O. Kramkov %T On the closure of a~family of martingale measures and an optional decomposition of supermartingales %J Teoriâ veroâtnostej i ee primeneniâ %D 1996 %P 892-896 %V 41 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/TVP_1996_41_4_a12/ %G ru %F TVP_1996_41_4_a12