Partial energies fluctuations and negative heat capacities
  We proceed to a critical examination of the method used in nuclear fragmentation to exhibit signals of negative heat capacity. We show that this method leads to unsatisfactory results when applied to a simple and well controlled model. Discrepancies are due to incomplete evaluation of potential energies. 
Xavier Campi (LPTMS), H. Krivine (LPTMS), E. Plagnol (APC-PCC), N.   Sator (LPTL)