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\bibitem{HADESCollaborationAgakishiev_etal2015} HADES Collaboration(Agakishiev, G. et al), Diaz, J., \& Gil, A. (2015). Study of the quasi-free np -> np pi(+)pi(-) reaction with a deuterium beam at 1.25 GeV/nucleon. \textit{Phys. Lett. B}, \textit{750}, 184--193.

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