%0 Journal Article %A S. Hurder %A Anatoly Katok %T Differentiability, rigidity and Godbillon-Vey classes for Anosov flows %J Publications Mathématiques de l'IHÉS %D 1990 %P 5-61 %V 72 %I Institut des Hautes Études Scientifiques %U https://pmihes.centre-mersenne.org/articles/10.1007/BF02699130/ %R 10.1007/BF02699130 %G en %F PMIHES_1990__72__5_0