Upconversion Emission Properties of Nb2O5 Modified Tellurite-Based Glasses Activated with Rare Earth Ions. The Eurasia Proceedings of Science, Technology, Engineering and Mathematics, [S. l.], v. 6, p. 122–125, 2019. Disponível em: https://epstem.net/index.php/epstem/article/view/211. Acesso em: 27 dec. 2025.