QED corrections with partial angular integration to fermion pair   production in e+e- - annihilation
  Analytic formulae are derived for the complete photon energy spectrum due to QED corrections to fermion pair production in case of a limited angular acceptance for the final state fermions. After a numerical integration over the energy of non-observed photons, this corresponds to typical experimental conditions at LEP/SLC. 
D. Bardin, M. Bilenky, A. Sazonov, Yu. Sedykh, T. Riemann, M. Sachwitz