@article{souza_mansur_2019,  title={COMPETING SOLVENT EXTRACTION OF CALCIUM AND/OR NICKEL WITH CYANEX 272 AND/OR D2EHPA},  volume={36},  ISSN={0104-6632},  url={https://doi.org/10.1590/0104-6632.20190361s20170527},  DOI={10.1590/0104-6632.20190361s20170527},  number={1},  journal={Brazilian Journal of Chemical Engineering},  publisher={Brazilian Society of Chemical Engineering},  author={Souza, Marcel F. A. de and Mansur, Marcelo B.},  year={2019},  month={Jan},  pages={541–547} }