@article{JRAM_1997__491_153948, author = {G.I. Lehrer and J. Michel and F. Digne}, title = {On {Gel'fand-Graev} characters of reductive groups with disconnected centre.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {131--148}, publisher = {mathdoc}, volume = {491}, year = {1997}, zbl = {0880.20033}, url = {http://geodesic.mathdoc.fr/item/JRAM_1997__491_153948/} }