A dynamical soft-wall holographic QCD model for chiral symmetry breaking and linear confinement Danning Li, Mei Huang and Qi-Shu Yan Eur. Phys. J. C, 73 10 (2013) 2615 Published online: 18 October 2013 DOI: 10.1140/epjc/s10052-013-2615-3