Density functional study of K and Na adsorbed on Co(0001) S. H. Ma, Z. Y. Jiao, T. X. Wang and Z. X. Yang Eur. Phys. J. B, 75 4 (2010) 469-474 Published online: 04 June 2010 DOI: 10.1140/epjb/e2010-00162-x