Global QCD analysis of parton structure of the nucleon: CTEQ5 parton distributions H.L. Lai, J. Huston, S. Kuhlmann, J. Morfin, F. Olness, J.F. Owens, J. Pumplin and W.K. Tung Eur. Phys. J. C, 12 3 (2000) 375-392 Published online: 21 December 1999 DOI: 10.1007/s100529900196