Three-gluon Green functions: low-momentum instanton dominance and zero-crossingJ. Rodríguez-Quintero, A. Athenodorou, D. Binosi, Ph. Boucaud, F. De Soto, J. Papavassiliou and S. ZafeiropoulosEPJ Web Conf., 137 (2017) 03018DOI: https://doi.org/10.1051/epjconf/201713703018