@article{CRMATH_2002__334_9_743_0,
     author = {Guirardel, Vincent},
     title = {Une alternative sur l'entropie des groupes},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {743--746},
     publisher = {Elsevier},
     volume = {334},
     number = {9},
     year = {2002},
     doi = {10.1016/S1631-073X(02)02365-8},
     language = {fr},
     url = {http://www.numdam.org/articles/10.1016/S1631-073X(02)02365-8/}
}