Solitons in a chiral quark model with non-local interactions
  Hedgehog solitons are found in a chiral quark model with non-local interactions. The solitons are stable without the chiral-circle constraint for the meson fields, as was assumed in previous Nambu-Jona--Lasinio model with local interactions. 
Bojan Golli, Wojciech Broniowski, and Georges Ripka