Constraints on Models for Proton-Proton Scattering from Multi-strange   Baryon Data
  The recent data on pp collisions at 158 GeV provide severe constraints on string models: These measurements allow for the first time to determine how color strings are formed in ultrarelativistic proton-proton collisions. 
F.M. Liu, J.Aichelin, M.Bleicher, H.J. Drescher, S. Ostapchenko, T.   Pierog, K. Werner