%0 Journal Article %A Hiroyuki Okura %T Recurrence Criteria for Skew Products of Symmetric Markov Processes. %J Forum mathematicum %D 1989 %P 331-358 %V 1 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FORUM_1989__1_3_141621/ %F FORUM_1989__1_3_141621