Critical behavior of a three-state Potts model on a Voronoi lattice F. W.S. Lima, U. M.S. Costa, M. P. Almeida and J. S. Andrade Jr. Eur. Phys. J. B, 17 1 (2000) 111-114 Published online: 15 September 2000 DOI: 10.1007/s100510070165