%0 Journal Article %A O. Kallenberg %T From Optional Skipping to Random Time Change --- on Some Recent Advances in Exchangeability Theory %J Teoriâ veroâtnostej i ee primeneniâ %D 1992 %P 64-74 %V 37 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TVP_1992_37_1_a9/ %G ru %F TVP_1992_37_1_a9