@article{sato_2000,  title={O(p + 1) x O(p + 1)-Invariant hypersurfaces with zero scalar curvature in euclidean space},  volume={72},  ISSN={0001-3765},  url={https://doi.org/10.1590/S0001-37652000000200001},  DOI={10.1590/S0001-37652000000200001},  number={2},  journal={Anais da Academia Brasileira de Ciências},  publisher={Academia Brasileira de Ciências},  author={SATO, JOCELINO},  year={2000},  month={Jun},  pages={109–115} }