Trace anomaly and induced action for a metric-scalar background Manuel Asorey, Wagno Cesar e Silva, Ilya L. Shapiro and Públio R. B. do Vale Eur. Phys. J. C, 83 2 (2023) 157 Published online: 17 February 2023 DOI: 10.1140/epjc/s10052-023-11293-5