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\section*{1999}

Huebers H-W, Schubert J, Semenov A, Gol{\textquoteright}tsman GN, Voronov BM, Gershenzon EM, et al. NbN phonon-cooled hot-electron bolometer as a mixer for THz heterodyne receivers. In: Chamberlain JM, editor. Proc. SPIE. Vol 3828. Spie; 1999. p. 410--6.

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