Amplitude analysis of high statistics results on γγ→π+π- and the two photon width of isoscalar statesM.R. Pennington, T. Mori, S. Uehara and Y. WatanabeEur. Phys. J. C, 56 1 (2008) 1-16DOI: https://doi.org/10.1140/epjc/s10052-008-0648-9