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@article{MZ_1989__201_4_174031, author = {Willberd van der Kallen}, title = {Longest {Weight} {Vectors} and {Excellent} {Filtrations.}}, journal = {Mathematische Zeitschrift}, pages = {19--32}, publisher = {mathdoc}, volume = {201}, number = {4}, year = {1989}, zbl = {0642.20037}, url = {http://geodesic.mathdoc.fr/item/MZ_1989__201_4_174031/} }
Willberd van der Kallen. Longest Weight Vectors and Excellent Filtrations.. Mathematische Zeitschrift, Tome 201 (1989) no. 4, pp. 19-32. http://geodesic.mathdoc.fr/item/MZ_1989__201_4_174031/