@article{10_21136_CMJ_1969_100902,
     author = {N\'aden{\'\i}k, Zbyn\v{e}k},
     title = {Eine {Kennzeichnung} der {Enveloppen} von achsensymmetrischen konvexen {Zylinderfl\"achen}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {356--362},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {1969},
     doi = {10.21136/CMJ.1969.100902},
     mrnumber = {0259819},
     zbl = {0181.49301},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1969.100902/}
}