Estimation of charm particles elementary cross sections relevant to   GSI-CBM project
  This note collects formulas relative to the energy dependence of the cross sections for open charm and $J/\psi$ production for $NN$-collisions at threshold. It is a basis for the best input to MonteCarlo calculations, for associative charm particle production in nucleon-nucleon, nucleon-nucleus, ion-ion and proton-antiproton collisions. 
Egle Tomasi-Gustafsson and Michail P. Rekalo