Statistical Coalescence Model with Exact Charm Conservation
  The statistical coalescence model for the production of open and hidden charm is considered within the canonical ensemble formulation. The data for the J/psi multiplicity in Pb+Pb collisions at 158 A GeV are used for the model prediction of the open charm yield which has not yet been measured in these reactions. 
M.I. Gorenstein, A.P. Kostyuk, H. Stoecker and W. Greiner