AdS-QCD quark–antiquark potential, meson spectrum and tetraquarksM. V. Carlucci, F. Giannuzzi, G. Nardulli, M. Pellicoro and S. StramagliaEur. Phys. J. C, 57 3 (2008) 569-578DOI: https://doi.org/10.1140/epjc/s10052-008-0687-2