%0 Journal Article %A Serge Yagunov %T Rigidity II: non-orientable case %J Documenta mathematica %D 2004 %P 29-40 %V 9 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/155/ %R 10.4171/dm/155 %F 10_4171_dm_155