Kosiel, K., Bugajski, M., Szerling, A., Kubacka-Traczyk, J., Karbownik, P., Pruszyńska-Karbownik, E., … Perlin, P. (2009). 77 K operation of AlGaAs/GaAs quantum cascade laser at 9 um. Photonics Letters of Poland, 1(1), pp. 16–18. https://doi.org/10.4302/photon. lett. pl.v1i1.14