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\bibitem{Karpov_etal2001} Karpov, A., Miller, D., Rice, F., Zmuidzinas, J., Stern, J. A., Bumble, B., et al. (2001). Low noise 1.2 THz SIS receiver. In C. Iit.u.t.e of T. Jet Propulsion Laboratory (Ed.), \textit{Proc. 12$^{th}$ Int. Symp. Space Terahertz Technol.} (pp. 21--22). San Diego, CA, USA.

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