Kosiel, Kamil, Maciej Bugajski, Anna Szerling, Justyna Kubacka-Traczyk, Piotr Karbownik, Emilia Pruszyńska-Karbownik, Jan Muszalski, et al. “77 K Operation of AlGaAs GaAs Quantum Cascade Laser at 9 Um”. Photonics Letters of Poland 1, no. 1 (March 28, 2009): pp. 16–18. Accessed November 23, 2024. http://photonics.pl/PLP/index.php/letters/article/view/1-6.