@article{ortiz_viana júnior_2014,  title={Rare earth elements in the international economic scenario},  volume={67},  ISSN={0370-4467},  url={https://doi.org/10.1590/0370-44672014670162},  DOI={10.1590/0370-44672014670162},  number={4},  journal={Rem: Revista Escola de Minas},  publisher={Escola de Minas},  author={Ortiz, Carlos Enrique Arroyo and Viana Júnior, Elias Marques},  year={2014},  month={Oct},  pages={361–366} }