@article{ARM_1973_9_1_a1,
     author = {Rosca, Radu and Vanhecke, Lieven},
     title = {Sur une classe de vari\'et\'es pseudo-isotropes},
     journal = {Archivum mathematicum},
     pages = {9--18},
     year = {1973},
     volume = {9},
     number = {1},
     mrnumber = {0643648},
     zbl = {0284.53026},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/ARM_1973_9_1_a1/}
}