@article{MSH_1974__46__5_0,
     author = {Kergall, Y.},
     title = {\'Etude des tresses de {Gutmann} en alg\`ebre \`a $P$ valeurs},
     journal = {Math\'ematiques et sciences humaines},
     pages = {5--19},
     publisher = {Ecole Pratique des hautes \'etudes, Centre de math\'ematique sociale et de statistique},
     volume = {46},
     year = {1974},
     mrnumber = {360375},
     zbl = {0335.06001},
     language = {fr},
     url = {http://www.numdam.org/item/MSH_1974__46__5_0/}
}