Confronting spectral functions from e+e- annihilation and decays: consequences for the muon magnetic moment M. Davier, S. Eidelman, A. Höcker and Z. ZhangEur. Phys. J. C, 27 4 (2003) 497-521DOI: https://doi.org/10.1140/epjc/s2003-01136-2