@article{shi_2008,  title={The hypersurfaces with conformal normal Gauss map in Hn+1 and S1n+1},  volume={80},  ISSN={0001-3765},  url={https://doi.org/10.1590/S0001-37652008000100002},  DOI={10.1590/S0001-37652008000100002},  number={1},  journal={Anais da Academia Brasileira de Ciências},  publisher={Academia Brasileira de Ciências},  author={Shi, Shuguo},  year={2008},  month={Mar},  pages={3–19} }