Komorowski, Paweł, Krzysztof Anders, Urszula Zdulska, and Ryszard Piramidowicz. “Erbium Doped ZBLAN Fiber Laser Operating in the Visible - Feasibility Study”. Photonics Letters of Poland 9, no. 3 (September 30, 2017): pp. 85–87. Accessed November 20, 2024. http://m.photonics.pl/PLP/index.php/letters/article/view/9-31.