@article{IM_1981__65_142859,
     author = {B. Perron},
     title = {Le {Noeud} },
     journal = {Inventiones mathematicae},
     pages = {441--452},
     year = {1981},
     volume = {65},
     url = {http://geodesic.mathdoc.fr/item/IM_1981__65_142859/}
}