@article{10_21136_CMJ_1962_100542,
     author = {Cenkl, Bohumil},
     title = {La normale d'une surface dans l'espace \`a connexion projective},
     journal = {Czechoslovak Mathematical Journal},
     pages = {582--606},
     publisher = {mathdoc},
     volume = {12},
     number = {4},
     year = {1962},
     doi = {10.21136/CMJ.1962.100542},
     mrnumber = {0149411},
     zbl = {0129.14303},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1962.100542/}
}