Effective actions for loop quantum cosmology in fourth-order gravity Marcello Miranda, Daniele Vernieri, Salvatore Capozziello and Francisco S. N. Lobo Eur. Phys. J. C, 81 11 (2021) 975 Published online: 06 November 2021 DOI: 10.1140/epjc/s10052-021-09767-5