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\bibitem{Zolotov_etal2021} Zolotov, P. I., Semenov, A. V., Divochiy, A. V., Goltsman, G. N., Romanov, N. R., \& Klapwijk, T. M. (2021). Dependence of photon detection efficiency on normal-state sheet resistance in marginally superconducting films of NbN. \textit{IEEE Trans. Appl. Supercond.}, \textit{31}(5), 1--5.

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