Ground-states of the three-dimensional Falicov-Kimball model P. Farkašovský, H. Čenčariková and N. Tomašovičová Eur. Phys. J. B, 45 4 (2005) 479-484 Published online: 13 July 2005 DOI: 10.1140/epjb/e2005-00217-1