Thermodynamics in NJL-like models
  Thermodynamic behavior of conventional Nambu-Jona-Lasinio and Polyakov-loop-extended Nambu-Jona-Lasinio models is compared. A particular attention is paid to the phase diagram in the ($T -\mu$) plane. 
A.V. Friesen, Yu.L. Kalinovsky, V.D. Toneev
hep-th