@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://archive.numdam.org/item/PMIHES_1965__25__49_0/} }