A fresh look at hadronic light-by-light scattering in the muon g - 2 with the Dyson-Schwinger approach C.S. Fischer, T. Goecke and R. Williams Eur. Phys. J. A, 47 2 (2011) 28 Published online: 24 February 2011 DOI: 10.1140/epja/i2011-11028-1