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\bibitem{Crespi_etal2011} Crespi, A., Ramponi, R., Osellame, R., Sansoni, L., Bongioanni, I., Sciarrino, F., et al. (2011). Integrated photonic quantum gates for polarization qubits. \textit{Nat. Comm.}, \textit{2}(566), 6.

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