%0 Journal Article %A Ledrappier, François %A Sarig, Omri %T Invariant measures for the horocycle flow on periodic hyperbolic surfaces %J Electronic research announcements of the American Mathematical Society %D 2005 %P 89-94 %V 11 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1090/S1079-6762-05-00151-4/ %R 10.1090/S1079-6762-05-00151-4 %F ERAAMS_2005_11_a10