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\bibitem{Baryshev_etal2002} Baryshev, A., Lauria, E., Hesper, R., Zijlstra, T., \& Wild, W. (2002). Fixed-tuned waveguide 0.6 THz SIS mixer with wide band IF. In Harward University (Ed.), \textit{Proc. 13$^{th}$ Int. Symp. Space Terahertz Technol.} (pp. 1--9). Cambridge, MA, USA.

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