Lowering the critical temperature with eight-quark interactions
  It is shown that eight-quark interactions, which are needed to stabilize the ground state of the combined three flavor Nambu -- Jona-Lasinio and 't Hooft Lagrangians, play also an important role in determining the critical temperature at which transitions occur from the dynamically broken chiral phase to the symmetric phase. 
A.A. Osipov, B. Hiller, J. Moreira, A. H. Blin, J. da Providencia