@article{CMUC_1975__16_2_a1,
     author = {Van\v{c}ura, Zden\v{e}k},
     title = {Differentialgeometrie der zweidimensionalen {Kugel-} und {Linienmannigfaltigkeiten} im dreidimensionalen {Euklidischen} {Raum.} {I.}},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {219--243},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {1975},
     mrnumber = {0385734},
     zbl = {0303.53014},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1975__16_2_a1/}
}