Sabikoglu, I., Ayvacikli, M., Bergeron, A., Ege, A., & Can, N. (2012). Photoluminescence Investigations of Li₂SiO₃:Ln (Ln=Er³⁺, Eu³⁺, Dy³⁺, Sm³⁺) Phosphors. Journal of Luminescence, 132(6), 1597-1602. External link