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\bibitem{Ilin_etal1999} Il{\textquoteright}in, K. S., Gol{\textquoteright}tsman, G. N., Voronov, B. M., \& Sobolewski, R. (1999). Characterization of the electron energy relaxation process in NbN hot-electron devices. In \textit{Proc. 10$^{th}$ Int. Symp. Space Terahertz Technol.} (pp. 390--397).

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