@article{gouveia_araujo_gouveia-neto_2001,  title={Thermal effects on light emission in Yb3+-sensitized rare-earth doped optical glasses},  volume={31},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332001000100017},  DOI={10.1590/S0103-97332001000100017},  number={1},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Gouveia, E. A. and Araujo, M. T. de and Gouveia-Neto, A. S.},  year={2001},  month={Mar},  pages={89–101} }