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\section*{2003}

Hajenius M, Baselmans JJA, Gao JR, Klapwijk TM, de Korte PAJ, Voronov B, et al. Improved NbN phonon cooled hot electron bolometer mixers. In: Proc. 14$^{th}$ Int. Symp. Space Terahertz Technol. Tucson, USA; 2003. p. 413--23.

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