%0 Journal Article %A Katok, A. %A Spatzier, R. %T Nonstationary normal forms and rigidity of group actions %J Electronic research announcements of the American Mathematical Society %D 1996 %P 124-133 %V 02 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1090/S1079-6762-96-00016-9/ %R 10.1090/S1079-6762-96-00016-9 %F ERAAMS_1996_02_3_a2