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\bibitem{Richter_etal2004} Richter H, Semenov A, Hubers H-W, Smirnov K, Gol{\textquoteright}tsman G, Voronov B. Phonon cooled hot-electron bolometric mixer for 1-5 THz. In: Proc. 29th IRMMW / 12th THz.; 2004. p. 241--2.

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