@article{CRMATH_2004__339_12_899_0,
     author = {Bouillard, Anne and Mairesse, Jean},
     title = {M\"obius inversion formula for the trace group},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {899--904},
     publisher = {Elsevier},
     volume = {339},
     number = {12},
     year = {2004},
     doi = {10.1016/j.crma.2004.10.017},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2004.10.017/}
}