Treatment of the infrared contribution: NLO QED evolution as a pedagogic example E. G. de Oliveira, A. D. Martin and M. G. Ryskin Eur. Phys. J. C, 73 8 (2013) 2534 Published online: 27 August 2013 DOI: 10.1140/epjc/s10052-013-2534-3