%0 Journal Article %A E. B. Dynkin %T Supermartingales with random birth times %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1971 %V 26 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1971_26_6_a7/ %G ru %F RM_1971_26_6_a7