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@article{IM_1978__48_142586, author = {Bertram Kostant}, title = {On {Whittaker} {Vectors} and {Representation} {Theory.}}, journal = {Inventiones mathematicae}, pages = {101--184}, publisher = {mathdoc}, volume = {48}, year = {1978}, zbl = {0405.22013}, url = {http://geodesic.mathdoc.fr/item/IM_1978__48_142586/} }
Bertram Kostant. On Whittaker Vectors and Representation Theory.. Inventiones mathematicae, Tome 48 (1978), pp. 101-184. http://geodesic.mathdoc.fr/item/IM_1978__48_142586/