The mixed black hole partition function for the STU model
  We evaluate the mixed partition function for dyonic BPS black holes using the recently proposed degeneracy formula for the STU model. The result factorizes into the OSV mixed partition function times a proportionality factor. The latter is in agreement with the measure factor that was recently conjectured for a class of N=2 black holes that contains the STU model. 
G. L. Cardoso, J. R. David, B. de Wit, S. Mahapatra