@article{GDZPPN002099500, title = {The Invariants of Unipotent Radicals of Parabolic Subgroups.}, journal = {Inventiones mathematicae}, volume = {74}, year = {1983}, pages = {1-10}, zbl = {0501.14007}, url = {http://dml.mathdoc.fr/item/GDZPPN002099500} }
Grosshans, F.D. The Invariants of Unipotent Radicals of Parabolic Subgroups.. Inventiones mathematicae, Tome 74 (1983) pp. 1-10. http://gdmltest.u-ga.fr/item/GDZPPN002099500/