%0 Journal Article %A Röhrle, Gerhard %T On normal abelian subgroups in parabolic groups %J Annales de l'Institut Fourier %D 1998 %P 1455-1482 %V 48 %N 5 %I Association des Annales de l’institut Fourier %U http://archive.numdam.org/articles/10.5802/aif.1662/ %R 10.5802/aif.1662 %G en %F AIF_1998__48_5_1455_0