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\bibitem{Yagoubov_etal1996} Yagoubov, P., Gol{\textquoteright}tsman, G., Voronov, B., Svechnikov, S., Cherednichenko, S., Gershenzon, E., et al. (1996). Quasioptical phonon-cooled NbN hot-electron bolometer mixer at THz frequencies. In \textit{Proc. 7$^{th}$ Int. Symp. Space Terahertz Technol.} (pp. 303--317).

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