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\bibitem{Sprengers_etal2011} Sprengers, J. P., Gaggero, A., Sahin, D., Jahanmirinejad, S., Frucci, G., Mattioli, F., et al. (2011). Waveguide superconducting single-photon detectors for integrated quantum photonic circuits. \textit{Appl. Phys. Lett.}, \textit{99}(18), 181110(1--3).

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