Gessesse, M. Molla. “The Noise Effect of Vacuum Reservoir on the Dynamics of Three-Level Laser Pumped by Coherent Light”. Ukrainian Journal of Physics 65, no. 5 (May 11, 2020): 385. Accessed April 26, 2024. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019480.