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\bibitem{Puetz_etal2012} P{\"u}tz, P., Honingh, C. E., Jacobs, K., Justen, M., Schultz, M., \& Stutzki, J. (2012). Terahertz hot electron bolometer waveguide mixers for GREAT. \textit{A\&A}, \textit{542}, L2.

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