@article{dan_tap_nguyen-truong_ty_zhou_qiu_2019,  title={Effects of Heat Treatment and Yb <sup>3+</sup> Concentration on the Downconversion Emission of Er <sup>3+</sup> /Yb <sup>3+</sup> Co-Doped Transparent Silicate Glass-Ceramics},  volume={22},  ISSN={1516-1439},  url={https://doi.org/10.1590/1980-5373-MR-2019-0113},  DOI={10.1590/1980-5373-MR-2019-0113},  number={5},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Dan, Ho Kim and Tap, Tran Duy and Nguyen-Truong, Hieu and Ty, Nguyen Minh and Zhou, Dacheng and Qiu, Jianbei},  year={2019},  pages={e20190113} }