@article{PMIHES_1994__79__131_0,
     author = {Katok, Anatole and Spatzier, Ralph J.},
     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},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {79},
     year = {1994},
     mrnumber = {96c:58132},
     zbl = {0819.58027},
     language = {en},
     url = {http://www.numdam.org/item/PMIHES_1994__79__131_0/}
}