@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/