RIEDENER, Toni; GÜDEL, Hans U. NIR-to-VIS Upconversion of Er³⁺ in Host Materials with Low-Energy Phonons. CHIMIA, [S. l.], v. 51, n. 3, p. 95, 1997. DOI: 10.2533/chimia.1997.95. Disponível em: https://www.chimia.ch/chimia/article/view/1997_095. Acesso em: 29 apr. 2024.