Enhancement of long-range antiferromagnetic order by nonmagnetic impurities in the Hubbard modelM. Ulmke, P. J.H. Denteneer, R. T. Scalettar and G. T. ZimanyiEurophys. Lett., 42 6 (1998) 655-660DOI: https://doi.org/10.1209/epl/i1998-00301-2