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\bibitem{Bulava_etal2015} Bulava, J., Della Morte, M., Heitger, J., \& Wittemeier, C. (2015). Non-perturbative improvement of the axial current in N-f=3 lattice QCD with Wilson fermions and tree-level improved gauge action. \textit{Nucl. Phys. B}, \textit{896}, 555--568.

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