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\bibitem{Yagoubov_etal2006} Yagoubov, P., Hoogeveen, R., Torgashin, M., Khudchenko, A., Koshelets, V., Suttiwong, N., et al. (2006). 550-650 GHz spectrometer development for TELIS. In \textit{Proc. 17$^{th}$ Int. Symp. Space Terahertz Technol.} (pp. 338--341).

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