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\bibitem{Ekstoerm_etal1997} Ekst{\"o}rm, H., Kollberg, E., Yagoubov, P., Gol{\textquoteright}tsman, G., Gershenzon, E., \& Yngvesson, S. (1997). Gain and noise bandwidth of NbN hot-electron bolometric mixers. \textit{Appl. Phys. Lett.}, \textit{70}(24), 3296--3298.

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