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\bibitem{Huebers_etal2002} H{\"u}bers, H. - W., Semenov, A., Richter, H., Birk, M., Krocka, M., Mair, U., et al. (2002). Terahertz Heterodyn Receiver with a hot-electron bolometer mixer. In U. Wolf, J. Farhoomand, \& C. R. McCreight (Eds.), \textit{Far-IR, Sub-mm \& MM Detector Technology Workshop} (pp. 3--24). NASA CP. NASA.

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