Gurin, O.V., A.V. Degtyarev, M. M. Dubinin, V.A. Maslov, K. I. Muntean, V. M. Ryabykh, O. O. Svystunov, and V.S. Senyuta. 2023. “Sharp and Moderate Focusing of the Combined Modes of a Terahertz Laser”. Visnyk of V.N. Karazin Kharkiv National University, Series “Radio Physics and Electronics”, no. 38 (June), 7-15. https://doi.org/10.26565/2311-0872-2023-38-01.