Instanton dominance over αs at low momenta from lattice QCD simulations at Nf = 0, Nf = 2 + 1 and Nf = 2 + 1 + 1Andreas Athenodorou, Philippe Boucaud, Feliciano de Soto, José Rodríguez-Quintero and Savvas ZafeiropoulosEPJ Web Conf., 175 (2018) 12011DOI: https://doi.org/10.1051/epjconf/201817512011