%0 Journal Article
%A M. Ratner
%T Rigid reparametrizations and cohomology for horocycle flows.
%J Inventiones mathematicae
%D 1987
%P 341-374
%V 88
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1987__88_143457/
%F IM_1987__88_143457