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\bibitem{Nanova+Oset2012} Nanova, M. et al, \& Oset, E. (2012). Transparency ratio in gamma A -> eta {\textquoteright} A {\textquoteright} and the in-medium eta {\textquoteright} width. \textit{Phys. Lett. B}, \textit{710}(4-5), 600--606.

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