Quasi-One-Dimensional Quantum Ferrimagnets
  We present an exact diagonalization study of the half-filled Hubbard model on bipartite quasi-one-dimensional lattices. In particular, we emphasize the dependence of the ferrimagnetic ground state properties, and its associated magnetic excitations, on the Coulomb repulsion U. 
R. R. Montenegro-Filho and M. D. Coutinho-Filho