The discrepancy between τ and e + e − spectral functions revisited and the consequences for the muon magnetic anomalyM. Davier, A. Hoecker, G. López Castro, B. Malaescu, X. H. Mo, G. Toledo Sánchez, P. Wang, C. Z. Yuan and Z. ZhangEur. Phys. J. C, 66 1-2 (2010) 127-136DOI: https://doi.org/10.1140/epjc/s10052-009-1219-4