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\bibitem{Ejrnaes_etal2007} Ejrnaes, M., Cristiano, R., Quaranta, O., Pagano, S., Gaggero, A., Mattioli, F., et al. (2007). A cascade switching superconducting single photon detector. \textit{Appl. Phys. Lett.}, \textit{91}(26), 262509 (1 to 3).

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