Leading-order hadronic contributions to the electron and tau anomalous magnetic moments Florian Burger, Karl Jansen, Marcus Petschlies and Grit Pientka Eur. Phys. J. C, 76 8 (2016) 464 Published online: 18 August 2016 DOI: 10.1140/epjc/s10052-016-4307-2