Global analysis of helicity PDFs: past - present - future
  We discuss the current status of the DSSV global analysis of helicity-dependent parton densities. A comparison with recent semi-inclusive DIS data from COMPASS is presented, and constraints on the polarized strangeness density are examined in some detail. 
D. de Florian, R. Sassot, M. Stratmann, W. Vogelsang
hep-ph