Exact solution of the 1D Hubbard model in the atomic limit with inter-site magnetic coupling Ferdinando Mancini, Evgeny Plekhanov and Gerardo Sica Eur. Phys. J. B, 86 5 (2013) 224 Published online: 20 May 2013 DOI: 10.1140/epjb/e2013-40046-y