The direct oxygen abundances of metal-rich galaxies derived from electron temperature Y. C. Liang, F. Hammer, S. Y. Yin, H. Flores, M. Rodrigues and Y. B. Yang A&A, 473 2 (2007) 411-421 Published online: 30 July 2007 DOI: 10.1051/0004-6361:20077436