e + e − annihilation to π 0 π 0 γ and π 0 η γ as a source of information on scalar and vector mesonsS. Eidelman, S. Ivashyn, A. Korchin, G. Pancheri and O. ShekhovtsovaEur. Phys. J. C, 69 1-2 (2010) 103-118DOI: https://doi.org/10.1140/epjc/s10052-010-1394-3