Quark model with chiral-symmetry breaking and confinement in the Covariant Spectator Theory Elmar P. Biernat, M. T. Peña, J. E. Ribeiro, A. Stadler and F. Gross EPJ Web Conf., 113 (2016) 05004 Published online: 25 March 2016 DOI: 10.1051/epjconf/201611305004