Up Conversion Enhancement in Lanthanide Ions Doped Heavy Metal Oxides: Advances in Synthesis and Applications of Lanthanide-doped Upconverting Nanoparticles. Journal of Advances and Scholarly Researches in Allied Education, [S. l.], v. 16, n. 9, p. 1719–1725, 2019. Disponível em: https://ignited.in/index.php/jasrae/article/view/12461.. Acesso em: 20 sep. 2024.