Is exponential gravity a viable description for the whole cosmological history? Sergei D. Odintsov, Diego Sáez-Chillón Gómez and German S. Sharov Eur. Phys. J. C, 77 12 (2017) 862 Published online: 13 December 2017 DOI: 10.1140/epjc/s10052-017-5419-z