@article{GDZPPN002110431,
title = {Parabolic subgroups with Abelian unipotent radical.},
journal = {Inventiones mathematicae},
volume = {110},
year = {1992},
pages = {649-671},
zbl = {0786.20029},
url = {http://dml.mathdoc.fr/item/GDZPPN002110431}
}
Richardson, R.; Röhrle, G.; Steinberg, R. Parabolic subgroups with Abelian unipotent radical.. Inventiones mathematicae, Tome 110 (1992) pp. 649-671. http://gdmltest.u-ga.fr/item/GDZPPN002110431/