@article{10_21136_CMJ_1963_100583,
     author = {B{\'\i}lkov\'a, Alena},
     title = {Sur la diff\'erentiabilit\'e du t\'etra\`edre de {Frenet} dans l'espace $E\sb4$},
     journal = {Czechoslovak Mathematical Journal},
     pages = {507--532},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {1963},
     doi = {10.21136/CMJ.1963.100583},
     mrnumber = {0158314},
     zbl = {0122.39502},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1963.100583/}
}