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@article{IM_1992__108_2_143985, author = {William A. Graham}, title = {Functions on the universal cover of the prinicpal nilpotent orbit.}, journal = {Inventiones mathematicae}, pages = {15--28}, publisher = {mathdoc}, volume = {108}, number = {2}, year = {1992}, zbl = {0781.22010}, url = {http://geodesic.mathdoc.fr/item/IM_1992__108_2_143985/} }
William A. Graham. Functions on the universal cover of the prinicpal nilpotent orbit.. Inventiones mathematicae, Tome 108 (1992) no. 2, pp. 15-28. http://geodesic.mathdoc.fr/item/IM_1992__108_2_143985/