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\bibitem{Goltsman+Gershenzon1999} Gol{\textquoteright}tsman, G. N., \& Gershenzon, E. M. (1999). Phonon-cooled hot-electron bolometric mixer: overview of recent results. \textit{Appl. Supercond.}, \textit{6}(10-12), 649--655.

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