@article{PMIHES_1965__25__49_0,
     author = {Steinberg, Robert},
     title = {Regular elements of semi-simple algebraic groups},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {49--80},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {25},
     year = {1965},
     mrnumber = {180554},
     zbl = {0136.30002},
     language = {en},
     url = {http://www.numdam.org/item/PMIHES_1965__25__49_0/}
}