LAOHAKUL, V.; BOONYARATTANAKALIN, K.; MEKPRASART, W.; PHOOHINKONG, W. Characterization of Erbium and Ytterbium Co-doped TiO2 Synthesized Using the Sol-gel Process for Photon Up-conversion Applications. Thai Journal of Nanoscience and Nanotechnology, Bangkok, Thailand, v. 8, n. 1, p. 1–10, 2023. Disponível em: https://ph05.tci-thaijo.org/index.php/TJNN/article/view/83. Acesso em: 4 apr. 2025.