The radiative return at ϕ- and B-factories: small-angle photon emission at next-to-leading order H. Czyż, A. Grzelińska, J.H. Kühn and G. Rodrigo Eur. Phys. J. C, 27 4 (2003) 563-575 Published online: 26 February 2003 DOI: 10.1140/epjc/s2003-01134-4