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\bibitem{Gerecht_etal1999} Gerecht, E., Musante, C. F., Jian, H., Zhuang, Y., Yngvesson, K. S., Dickinson, J., et al. (1999). Improved characteristics of NbN HEB mixers integrated with log-periodic antennas. In \textit{Proc. 10$^{th}$ Int. Symp. Space Terahertz Technol.} (pp. 200--207).

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