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\bibitem{Kroug_etal2001} Kroug, M., Cherednichenko, S., Merkel, H., Kollberg, E., Voronov, B., Gol{\textquoteright}tsman, G., et al. (2001). NbN hot electron bolometric mixers for terahertz receivers. \textit{IEEE Trans. Appl. Supercond.}, \textit{11}(1), 962--965.

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