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\bibitem{Kroug_etal1997} Kroug, M., Yagoubov, P., Gol{\textquoteright}tsman, G., \& Kollberg, E. (1997). NbN quasioptical phonon cooled hot electron bolometric mixers at THz frequencies. In \textit{Inst. Phys. Conf. Ser.} (Vol. 1, pp. 405--408). Bristol.

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