@article{10_21136_CMJ_1969_100935,
     author = {Vaisman, Izu},
     title = {Sur la partie d'une hypersurface, o\`u le tenseur asymptotique est du type hyperbolique normal},
     journal = {Czechoslovak Mathematical Journal},
     pages = {750--757},
     publisher = {mathdoc},
     volume = {19},
     number = {4},
     year = {1969},
     doi = {10.21136/CMJ.1969.100935},
     mrnumber = {0250203},
     zbl = {0187.43104},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1969.100935/}
}