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\bibitem{LHCbCollaborationAaij_etal2019} LHCb Collaboration(Aaij, R. et al), Garcia Martin, L. M., Henry, L., Martinez-Vidal, F., Oyanguren, A., Remon Alepuz, C., et al. (2019). First Measurement of Charm Production in its Fixed-Target Configuration at the LHC. \textit{Phys. Rev. Lett.}, \textit{122}(13), 132002--12pp.

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