@article{10_21136_CMJ_1984_101987,
     author = {Thas, Charles},
     title = {A theory on non-developable generalized ruled surfaces in the elliptic space $E^m$},
     journal = {Czechoslovak Mathematical Journal},
     pages = {609--618},
     year = {1984},
     volume = {34},
     number = {4},
     doi = {10.21136/CMJ.1984.101987},
     mrnumber = {764443},
     zbl = {0565.53009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1984.101987/}
}