%0 Journal Article %A R.W. jr. Richardson %T Principal Orbit Types for Reductive Groups Acting on Stein Manifolds. %J Mathematische Annalen %D 1974 %P 323-332 %V 208 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1974__208_162578/ %F MAN_1974__208_162578