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\bibitem{Goltsman_etal2005} Gol{\textquoteright}tsman, G. N., Vachtomin, Y. B., Antipov, S. V., Finkel, M. I., Maslennikov, S. N., Smirnov, K. V., et al. (2005). NbN phonon-cooled hot-electron bolometer mixer for terahertz heterodyne receivers. In \textit{Proc. SPIE} (Vol. 5727, pp. 95--106).

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