The isospin-dependent quadrupole-quadrupole interaction used in shell model calculations – the effects of including excitations and a two-body spin-orbit interaction term M.S. Fayache, Y.Y. Sharon, L. Zamick and S.J. LeeEur. Phys. J. A, 7 3 (2000) 385-390DOI: https://doi.org/epja/v7/p385(epja222)