M. Aram, Z. Porhasannejad, E. Aghayare, and S. Behrouzinia, trans. 2012. “Intra-Cavity Loss Element Method for Measurement of the Small Signal Gain of a TEA CO2 Laser”. International Journal of Fundamental Physical Sciences 2 (4): 58-60. https://doi.org/10.14331/ijfps.2012.330038.