Khabibullin, R.A., N.V. Shchavruk, D.S. Ponomarev, D.V. Ushakov, A.A. Afonenko, K.V. Maremyanin, O.Yu. Volkov, V.V. Pavlovskiy, and A.A. Dubinov. “The Operation of THz Quantum Cascade Laser in the Region of Negative Differential Resistance”. Opto-Electronics Review 27, no. 4 (April 25, 2026): 329–333. Accessed May 14, 2026. https://wydawnictwo.pan.pl/index.php/opelre/article/view/681.