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\bibitem{BeltranJimenez_etal2017} Beltran Jimenez, J., Heisenberg, L., Olmo, G. J., \& Rubiera-Garcia, D. (2017). On gravitational waves in Born-Infeld inspired non-singular cosmologies. \textit{J. Cosmol. Astropart. Phys.}, \textit{10}(10), 029--23pp.

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