Limitations on the Ginzburg criterion for dirty superconductors
  The contributions of superconducting fluctuations to the specific heat of dirty superconductors are calculated, including quantum and classical corrections to the `usual' leading Gaussian divergence. These additional terms modify the Ginzburg criterion, which is based on equating these fluctuation-generated contributions to the mean-field discontinuity in the specific heat, and set limits on its applicability for materials with a low transition temperature. 
A. Aharony, O. Entin-Wohlman, H. Bary-Soroker and Y. Imry
cond-mat.supr-con cond-mat.stat-mech