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\bibitem{Smirnov_etal2021} Smirnov, K., Moshkova, M., Antipov, A., Morozov, P., \& Vakhtomin, Y. (2021). The cascade switching of the photon number resolving superconducting single-photon detectors. \textit{IEEE Trans. Appl. Supercond.}, \textit{31}(2), 1--4.

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