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\bibitem{Goltsman_etal1994} Gol{\textquoteright}tsman G, Jacobsson S, Ekstrom H, Karasik B, Kollberg E, Gershenzon E. Slot-line tapered antenna with NbN hot electron mixer for 300-360 GHz operation. In: Proc. 5$^{th}$ Int. Symp. Space Terahertz Technol.; 1994. p. 209--213a.

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