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\bibitem{Verevkin_etal2002} Verevkin AA, Zhang J, Slysz W, Sobolewski R, Lipatov AP, Okunev O, et al. Superconducting single-photon detectors for GHz-rate free-space quantum communications. In: Ricklin JC, Voelz DG, editors. Proc. SPIE. Vol 4821. SPIE; 2002. p. 447--54.

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