A Detailed Comparison of NLO QCD Evolution Codes
  Seven next-to-leading order QCD evolution programs are compared. The deviations of the results due to different theoretical prescriptions for truncating the perturbative series are clarified, and a numerical agreement between five codes of better than 0.1% is achieved. Reference results for further comparison are provided. 
J. Bl\"umlein, M. Botje, C. Pascaud, S. Riemersma, W.L. van Neerven,   A. Vogt, F. Zomer