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\bibitem{Casas_etal2018} Casas, J. A., Gomez Vargas, G. A., Moreno, J. M., Quilis, J., \& Ruiz de Austri, R. (2018). Extended Higgs-portal dark matter and the Fermi-LAT Galactic Center Excess. \textit{J. Cosmol. Astropart. Phys.}, \textit{06}(6), 031--16pp.

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