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\bibitem{Ikeno_etal2020} Ikeno, N., Dai, L. R., \& Oset, E. (2020). Meson exchange between initial and final state and the R-D ratio in the B-bar -> D nu-bar l (nu_tau-bar tau) reactions. \textit{Eur. Phys. J. A}, \textit{56}(2), 73--12pp.

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