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\bibitem{Blundell_etal1998} Blundell, R., Kawamura, J. H., Tong, C. E., Papa, D. C., Hunter, T. R., Gol{\textquoteright}tsman, G. N., et al. (1998). A hot-electron bolometer mixer receiver for the 680-830 GHz frequency range. In \textit{Proc. 6-th Int. Conf. Terahertz Electron.} (pp. 18--20). IEEE.

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