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\bibitem{Constantinou_etal2011} Constantinou, M., Dimopoulos, P., Frezzotti, R., Jansen, K., Gimenez, V., Lubicz, V., et al. (2011). B-K-parameter from N-f=2 twisted mass lattice QCD. \textit{Phys. Rev. D}, \textit{83}(1), 014505--20pp.

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