@incollection{SB_1972-1973__15__307_0,
     author = {Steinberg, Robert},
     title = {Abstract homomorphisms of simple algebraic groups},
     booktitle = {S\'eminaire Bourbaki : vol. 1972/73, expos\'es 418-435},
     series = {S\'eminaire Bourbaki},
     note = {talk:435},
     pages = {307--326},
     publisher = {Springer-Verlag},
     number = {15},
     year = {1974},
     mrnumber = {414732},
     zbl = {0294.20040},
     language = {en},
     url = {http://archive.numdam.org/item/SB_1972-1973__15__307_0/}
}