%0 Journal Article %A A. Joseph %T Kostant's Problem, Goldie Rank and the Gelfand-Kirillov Conjecture. %J Inventiones mathematicae %D 1980 %P 191-214 %V 56 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1980__56_142695/ %F IM_1980__56_142695