@article{01127646,
title = {Spherical hypersurfaces with 2-type Gauss map.},
journal = {Beitr\"age zur Algebra und Geometrie},
volume = {39},
year = {1998},
pages = {169-179},
zbl = {0901.53002},
language = {en},
url = {http://dml.mathdoc.fr/item/01127646}
}
Chen, Bang-yen; Li, Shijie. Spherical hypersurfaces with 2-type Gauss map.. Beiträge zur Algebra und Geometrie, Tome 39 (1998) pp. 169-179. http://gdmltest.u-ga.fr/item/01127646/