A new method for nuclear-reaction network analysis, element production   in S-Cl region during the He and C burning in 25 Ms stars
  This paper presents the results of calculation of element overproduction in the S-Cl region during helium and carbon burning in massive stars (25 Ms). Calculations for a given set of differential equations were performed using integrated mathematical systems. The authors think that this method may be successfully adopted for other physical problems in which solving nuclear-reaction network play an important role, in particular for the problem of transmutation of heavy elements and chemical kinetics. 
P. Szalanski, I. Padureanu, M. Stepinski, Yu.M. Gledenov, P.V.   Sedyshev, R. Machrafi, A. Oprea, D. Aranghel, J. Marganiec