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\bibitem{Semenov_etal2007} Semenov A, Richter H, Smirnov A, G{\"u}nther B, H{\"u}bers H-W, Il{\textquoteright}in K, et al. Development of HEB mixers for GREAT and for security screening [abstract]. In: Proc. 18$^{th}$ Int. Symp. Space Terahertz Technol.; 2007. 184.

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