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\bibitem{Karasik_etal1995} Karasik, B. S., Gol{\textquoteright}tsman, G. N., Voronov, B. M., Svechnikov, S. I., Gershenzon, E. M., Ekstrom, H., et al. (1995). Hot electron quasioptical NbN superconducting mixer. \textit{IEEE Trans. Appl. Supercond.}, \textit{5}(2), 2232--2235.

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