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\bibitem{Okunev_etal2005} Okunev, O., Chulkova, G., Milostnaya, I., Antipov, A., Smirnov, K., Morozov, D., et al. (2005). Registration of infrared single photons by a two-channel receiver based on fiber-coupled superconducting single-photon detectors. In \textit{Proc. 2-nd CAOL} (Vol. 2, pp. 282--285).

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