Physical Review Letters, 122(13):132002. AMER PHYSICAL SOC Digital.CSIC. Repositorio Institucional del CSIC instname LHCb Collaboration 2019, ' First Measurement of Charm Production in its Fixed-Target Configuration at the LHC ', Physical Review Letters, vol. 122, no. 13, 132002, pp. 1-12 . https://doi.org/10.1103/PhysRevLett.122.132002 PRL Physical Review Letters Dipòsit Digital de la UB Universidad de Barcelona Physical Review Letters, 122(13):132002, 1-12. American Physical Society Phys.Rev.Lett. Phys.Rev.Lett., 2019, 122 (13), pp.132002. ⟨10.1103/PhysRevLett.122.132002⟩ Appleby, R, Borghi, S, Burr, C, De Capua, S, Dutta, D, Gersabeck, E, Gersabeck, M, Grillo, L, Hilton, M, Lafferty, G, Mcnab, A, Parkes, C, Sarpis, G, Williams, M & The LHCb Collaboration 2019, ' First Measurement of Charm Production in its Fixed-Target Configuration at the LHC ', Physical Review Letters, vol. 122, 132002 . https://doi.org/10.1103/PhysRevLett.122.132002 Physical review letters : PRL 122(13), 132002 (2019). doi:10.1103/PhysRevLett.122.132002