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\bibitem{ATLASCollaborationAad_etal2014} ATLAS Collaboration(Aad, G. et al), Cabrera Urban, S., Castillo Gimenez, V., Costa, M. J., Ferrer, A., Fiorini, L., et al. (2014). Measurements of spin correlation in top-antitop quark events from proton-proton collisions at root s=7 TeV using the ATLAS detector. \textit{Phys. Rev. D}, \textit{90}(11), 112016--32pp.

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