@article{alías_almeida_brasil jr._2004,  title={Hypersurfaces with constant mean curvature and two principal curvatures in <img id="_x0000_i1025" src="../../../../img/revistas/aabc/v76n3/a03img01.gif" align=absbottom>n+1},  volume={76},  ISSN={0001-3765},  url={https://doi.org/10.1590/S0001-37652004000300003},  DOI={10.1590/S0001-37652004000300003},  number={3},  journal={Anais da Academia Brasileira de Ciências},  publisher={Academia Brasileira de Ciências},  author={Alías, Luis J. and Almeida, Sebastião C. de and Brasil Jr., Aldir},  year={2004},  month={Sep},  pages={489–497} }