@article{lima_roitman_2002,  title={Constant mean curvature one surfaces in hyperbolic 3-space using the Bianchi-Calò method},  volume={74},  ISSN={0001-3765},  url={https://doi.org/10.1590/S0001-37652002000100002},  DOI={10.1590/S0001-37652002000100002},  number={1},  journal={Anais da Academia Brasileira de Ciências},  publisher={Academia Brasileira de Ciências},  author={LIMA, LEVI L. DE and ROITMAN, PEDRO},  year={2002},  month={Mar},  pages={19–24} }