Precision determination of the strong coupling constant within a global PDF analysis - NNPDF CollaborationRichard D. Ball, Stefano Carrazza, Luigi Del Debbio, Stefano Forte, Zahari Kassabov, Juan Rojo, Emma Slade and Maria UbialiEur. Phys. J. C, 78 5 (2018) 408DOI: https://doi.org/10.1140/epjc/s10052-018-5897-7