Non-perturbative determination of improvement b-coefficients in Nf = 3 Giulia Maria de Divitiis, Maurizio Firrotta, Jochen Heitger, Carl Christian Köster and Anastassios Vladikas EPJ Web Conf., 175 (2018) 10008 Published online: 26 March 2018 DOI: 10.1051/epjconf/201817510008