Aram, M., Z. Porhasannejad, E. Aghayare, and S. Behrouzinia. “Intra-Cavity Loss Element Method for Measurement of the Small Signal Gain of a TEA CO2 Laser: TEA CO2 Laser”. International Journal of Fundamental Physical Sciences 2, no. 4 (December 31, 2012): 58-60. Accessed June 25, 2022. https://www.fundamentaljournals.org/index.php/ijfps/article/view/117.