@article{CMH_1985__60_140001,
     author = {Jacques Th\'evenaz and Charles Kratzer},
     title = {Type d'homotopie des treillis et treillis des sous-groupes d'un groupe fini.},
     journal = {Commentarii mathematici Helvetici},
     pages = {85--106},
     publisher = {mathdoc},
     volume = {60},
     year = {1985},
     zbl = {0606.06006},
     url = {http://geodesic.mathdoc.fr/item/CMH_1985__60_140001/}
}