%0 Journal Article %A Hanspeter Kraft %A Vladimir L. Popov %T Semisimple group actions on the three dimensional affine space are linear. %J Commentarii mathematici Helvetici %D 1985 %P 466-479 %V 60 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1985__60_140027/ %F CMH_1985__60_140027