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\bibitem{Dada_etal2011} Dada, A. C., Leach, J., Buller, G. S., Padgett, M. J., \& Andersson, E. (2011). Experimental high-dimensional two-photon entanglement and violations of generalized Bell inequalities. \textit{Nat. Phys.}, \textit{7}(9), 677--680.

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