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\bibitem{Gomez-Vargas_etal2017} Gomez-Vargas, G. A., Lopez-Fogliani, D. E., Mu{\~n}oz, C., Perez, A. D., \& Ruiz de Austri, R. (2017). Search for sharp and smooth spectral signatures of $\mu$nu SSM gravitino dark matter with Fermi- LAT. \textit{J. Cosmol. Astropart. Phys.}, \textit{03}(3), 047--23pp.

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