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\bibitem{ATLASCollaborationAad_etal2015} ATLAS Collaboration(Aad, G. et al), Alvarez Piqueras, D., Cabrera Urban, S., Castillo Gimenez, V., Costa, M. J., Fernandez Martinez, P., et al. (2015). Determination of the Ratio of b-Quark Fragmentation Fractions f(s)/f(d) in pp Collisions at root s=7 TeV with the ATLAS Detector. \textit{Phys. Rev. Lett.}, \textit{115}(26), 262001--18pp.

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