Light-by-light forward scattering amplitudes in Lattice QCDAntoine Gérardin, Jeremy Green, Oleksii Gryniuk, Georg von Hippel, Harvey B. Meyer, Vladimir Pascalutsa and Hartmut WittigEPJ Web Conf., 175 (2018) 06030DOI: https://doi.org/10.1051/epjconf/201817506030