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\bibitem{Belitsky_etal2011} Belitsky, V., Desmaris, V., Dochev, D., Meledin, D., \& Pavolotsky, A. (2011). Towards Multi-Pixel Heterodyne Terahertz  Receivers. In \textit{Proc. 22$^{th}$ Int. Symp. Space Terahertz Technol.}.

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