Nucleosynthesis of PopIII Core Collapse Supernovae and the Abundances of   Extremely Metal Poor Stars
  We present a new analysis of the abundances observed in extremely metal poor stars based on both a new generation of theoretical presupernova models and explosions of zero metallicity massive stars and a new abundance analysis of an homogeneous sample of stars having [Fe/H]<-2.5 (Cayrel et al. 2004). 
Marco Limongi (INAF-OAR) & Alessandro Chieffi (INAF-IAS)