Next-To-Leading Order Determination of Fragmentation Functions
  We analyse LEP and PETRA data on single inclusive charged hadron cross-sections to establish new sets of Next-to-Leading order Fragmentation Functions. Data on hadro-production of large-$p_{\bot}$ hadrons are also used to constrain the gluon Fragmentation Function. We carry out a critical comparison with other NLO parametrizations. 
L. Bourhis, M. Fontannaz, J.Ph. Guillet, M. Werlen