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\bibitem{Hidalgo-Duque_etal2013} Hidalgo-Duque, C., Nieves, J., Ozpineci, A., \& Zamiralov, V. (2013). X(3872) and its partners in the heavy quark limit of QCD. \textit{Phys. Lett. B}, \textit{727}(4-5), 432--437.

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