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\bibitem{Makarenko_etal2014} Makarenko, A. N., Odintsov, S. D., \& Olmo, G. J. (2014). Little Rip, Lambda CDM and singular dark energy cosmology from Born-Infeld-f(R) gravity. \textit{Phys. Lett. B}, \textit{734}, 36--40.

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