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\bibitem{Cherednichenko_etal2007} Cherednichenko, S., Drakinskiy, V., Baubert, J., Lecomte, B., Dauplay, F., Krieg, J. - M., et al. (2007). 2.5 THz multipixel heterodyne receiver based on NbN HEB mixers. In \textit{Proc. 18$^{th}$ Int. Symp. Space Terahertz Technol.} (112).

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