Sulphur overlayers on Ir(100) and its effect on the adsorption of CO: a DFT studyS.H. Ma, Z.Y. Jiao, X.Q. Dai and Z.X. YangEur. Phys. J. B, 83 4 (2011) 437-443DOI: https://doi.org/10.1140/epjb/e2011-20404-7