@article{10_4171_dm_15,
     author = {Meinolf Geck},
     title = {On the average values of the irreducible characters of finite groups of {Lie} type on geometric unipotent classes},
     journal = {Documenta mathematica},
     pages = {293--317},
     year = {1996},
     volume = {1},
     doi = {10.4171/dm/15},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/15/}
}