@article{BUMI_1959_3_14_3_a5,
     author = {Vincensini, Paul},
     title = {Sur une repr\'esentation des cercles et des sph\`eres de l'espace  ordinaire sur l'espace euclidien \`a quatre dimensions.},
     journal = {Bollettino della Unione matematica italiana},
     pages = {338--344},
     publisher = {mathdoc},
     volume = {Ser. 3, 14},
     number = {3},
     year = {1959},
     zbl = {0103.38201},
     mrnumber = {112069},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1959_3_14_3_a5/}
}