@article{PMIHES_1994__79__131_0,
     author = {Anatole Katok and Ralph J. Spatzier},
     title = {First cohomology of {Anosov} actions of higher rank abelian groups and applications to rigidity},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {131--156},
     year = {1994},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {79},
     doi = {10.1007/BF02698888},
     mrnumber = {96c:58132},
     zbl = {0819.58027},
     language = {en},
     url = {https://pmihes.centre-mersenne.org/articles/10.1007/BF02698888/}
}