Quark propagator in a covariant gauge
  Using mean--field improved gauge field configurations, we compare the results obtained for the quark propagator from Wilson fermions and Overlap fermions on a $\3$ lattice at a spacing of $a=0.125(2)$ fm. 
F.D.R. Bonnet, D.B. Leinweber, A.G. Williams, J.M. Zanotti, and J.B.   Zhang