1. Yb3+−Er3+ glass laser;Snitzer;Applied Physics Letters,1965
2. Erbium glass lasers and their applications;Gapontsev;Optics and Laser Technology,1982
3. Laser Phosphate Glasses;Alekseev,1983
4. Energy parameters of lasers utilizing erbium glasses sensitized with ytterbium and chromium;Lunter;Quantum Electronics,1984
5. Investigation of the lasing capabilities of new erbium glasses;Denker;Quantum Electronics,1991