@article{01814783, title = {A characterization of regular saddle surfaces in the hyperbolic and spherical three-space.}, journal = {Abstract and Applied Analysis}, volume = {7}, year = {2002}, pages = {349-355}, doi = {10.1155/S1085337502203036}, zbl = {1022.53015}, language = {en}, url = {http://dml.mathdoc.fr/item/01814783} }
Kalikakis, Dimitrios E. A characterization of regular saddle surfaces in the hyperbolic and spherical three-space.. Abstract and Applied Analysis, Tome 7 (2002) pp. 349-355. doi : 10.1155/S1085337502203036. http://gdmltest.u-ga.fr/item/01814783/