Nucleon magnetic moments in an extended chiral constituent quark model R. F. Wagenbrunn, M. Radici, S. Boffi and P. Demetriou Eur. Phys. J. A, 8 3 (2000) 385-388 Published online: 15 September 2000 DOI: 10.1007/s10050-000-5075-8