On a possible interpretation of the X(3872) as a 11D2 state in a constituent-quark model based on a generalized Fermi-Breit equationM. De Sanctis and P. QuinteroEur. Phys. J. A, 47 4 (2011) 54DOI: https://doi.org/10.1140/epja/i2011-11054-y