Non-uniform phases in a three-flavour 't Hooft extended   Nambu-Jona--Lasinio model
  The possible existence of non-uniform phases in cold dense quark matter in the light quark sector ($u$, $d$ and $s$) is addressed using the Nambu-Jona--Lasinio Model extended to include flavour-mixing 't Hooft determinant. The effect of changes in the coupling strengths of the model is discussed. It is seen that the inclusion of the strange sector catalyses the appearance of these non-uniform phases extending the domain for their appearance. 
J. Moreira, B. Hiller, W. Broniowski, A. A. Osipov, A. H. Blin
hep-ph