Hadronic Ratios and the Number of Projectile Participants. Thermal   hadron production in Si-Au collisions
  We investigate the dependence of hadronic ratios on the number of projectile participants using a thermal model incorporating exact baryon number and strangeness conservation. A comparison is made with results from $Au-Au$ collisions obtained at the BNL-AGS. 
Jean Cleymans and Azwinndini Muronga