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\bibitem{Huebers_etal2001} H{\"u}bers H-W, Semenov AD, Richter H, Schubert J, Hadjiloucas S, Bowen JW, et al. Antenna pattern of the quasi-optical hot-electron bolometric mixer at terahertz frequencies. In: Proc. 12$^{th}$ Int. Symp. Space Terahertz Technol. San Diego, CA, USA; 2001. p. 286--96.

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