@article{GDZPPN002306875,
title = {The Poincar\'e Series of a Coxeter Group.},
journal = {Mathematische Annalen},
volume = {196},
year = {1972},
pages = {161-174},
zbl = {0286.20062},
url = {http://dml.mathdoc.fr/item/GDZPPN002306875}
}
Macdonald, I.G. The Poincaré Series of a Coxeter Group.. Mathematische Annalen, Tome 196 (1972) pp. 161-174. http://gdmltest.u-ga.fr/item/GDZPPN002306875/