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\bibitem{Geng+Oset2016} Geng, L. S., \& Oset, E. (2016). Novel nonperturbative approach for radiative (B)over-bar(0)((B)over-bar(s)(0)) -> J/psi gamma decays. \textit{Phys. Rev. D}, \textit{94}(1), 014018--11pp.

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