@article{IM_1991__105_3_143911,
     author = {Friedrich Knop},
     title = {Nichtlinearisierbare {Operationen} halbeinfacher {Gruppen} auf affinen {R\"aumen.}},
     journal = {Inventiones mathematicae},
     pages = {217--220},
     publisher = {mathdoc},
     volume = {105},
     number = {3},
     year = {1991},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/IM_1991__105_3_143911/}
}