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\bibitem{Yao_etal2018} Yao, D. L., Alvarez-Ruso, L., Hiller Blin, A. N., \& Vicente Vacas, M. J. (2018). Weak pion production off the nucleon in covariant chiral perturbation theory. \textit{Phys. Rev. D}, \textit{98}(7), 076004--25pp.

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