@article{01021601, title = {Nonstationary normal forms and rigidity of group actions.}, journal = {Electronic Research Announcements of the American Mathematical Society [electronic only]}, volume = {02}, year = {1996}, pages = {124-133}, doi = {10.1090/S1079-6762-96-00016-9}, zbl = {0871.58073}, language = {en}, url = {http://dml.mathdoc.fr/item/01021601} }
Katok, A.; Spatzier, R.J. Nonstationary normal forms and rigidity of group actions.. Electronic Research Announcements of the American Mathematical Society [electronic only], Tome 02 (1996) pp. 124-133. doi : 10.1090/S1079-6762-96-00016-9. http://gdmltest.u-ga.fr/item/01021601/