@article{sousa_melo_silva_nasar_nasar_varela_2007,  title={Photoluminescence in ZrO2 doped with Y and La},  volume={53},  ISSN={0366-6913},  url={https://doi.org/10.1590/S0366-69132007000100015},  DOI={10.1590/S0366-69132007000100015},  number={325},  journal={Cerâmica},  publisher={Associação Brasileira de Cerâmica},  author={Sousa, W. S. C. de and Melo, D. M. A. and Silva, J. E. C. da and Nasar, R. S. and Nasar, M. C. and Varela, J. A.},  year={2007},  month={Jan},  pages={99–103} }