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\bibitem{Stucki_etal2009} Stucki, D., Walenta, N., Vannel, F., Thew, R. T., Gisin, N., Zbinden, H., et al. (2009). High rate long-distance quantum key distribution  over 250 km of ultra low loss fibres. \textit{New J. Phys.}, \textit{11}(7), 075003.

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