Reading entanglement in terms of spin configurations in quantum magnets A. Fubini, T. Roscilde, V. Tognetti, M. Tusa and P. Verrucchi Eur. Phys. J. D, 38 3 (2006) 563-570 Published online: 20 April 2006 DOI: 10.1140/epjd/e2006-00090-6