LATKIN, K.P.; SMIRNOV, A.S.; BURDIN, V.V. Analytical estimation of the luminescence power of erbium ions in the active fiber preform. Perm Federal Research Centre Journal, [S. l.], n. 4, p. 41–46, 2021. DOI: 10.7242/2658-705X/2020.4.3. Disponível em: https://journal.permsc.ru/index.php/pscj/article/view/PSCJ2020n4p3. Acesso em: 15 may. 2026.