@article{10_21136_CMJ_1957_100247,
     author = {Urban, Alois},
     title = {Th\'eor\`eme fondamental de la th\'eorie du contact des courbes},
     journal = {Czechoslovak Mathematical Journal},
     pages = {273--294},
     year = {1957},
     volume = {7},
     number = {2},
     doi = {10.21136/CMJ.1957.100247},
     mrnumber = {0089443},
     zbl = {0089.37903},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1957.100247/}
}