Magnetic moment of the pentaquark Θ+(1540) as diquark-diquark-antiquark state with QCD sum rules Z. G. Wang, S. L. Wan and W. M. Yang Eur. Phys. J. C, 45 1 (2006) 201-209 Published online: 15 January 2006 DOI: 10.1140/epjc/s2005-02400-1