Gauge model at finite temperature with massive quarks and at finite   density on anisotropic lattice
  Critical properties of QCD and the chiral condensate at finite density are analytically studied on an anisotropic lattice in the approximation SU(N) \simeq Z(N). Asymptotic behavior of the partition function and its continuum limit are discussed. 
L.A.Averchenkova, V.K.Petrov, G.M.Zinovjev