From stable to unstable anomaly-induced inflation Tibério de Paula Netto, Ana M. Pelinson, Ilya L. Shapiro and Alexei A. Starobinsky Eur. Phys. J. C, 76 10 (2016) 544 Published online: 06 October 2016 DOI: 10.1140/epjc/s10052-016-4390-4