@article{01016563,
title = {On the average values of the irreducible characters of finite groups of Lie type on geometric unipotent classes.},
journal = {Documenta Mathematica},
volume = {1},
year = {1996},
pages = {293-317},
zbl = {0873.20011},
language = {en},
url = {http://dml.mathdoc.fr/item/01016563}
}
Geck, Meinolf. On the average values of the irreducible characters of finite groups of Lie type on geometric unipotent classes.. Documenta Mathematica, Tome 1 (1996) pp. 293-317. http://gdmltest.u-ga.fr/item/01016563/