DFT study of BaTiO3 (001) surface with O and O2 adsorption G. Rakotovelo, P. S. Moussounda, M. F. Haroun, P. Légaré, A. Rakotomahevitra and J. C. Parlebas Eur. Phys. J. B, 57 3 (2007) 291-297 Published online: 06 June 2007 DOI: 10.1140/epjb/e2007-00163-x