Oxygen and zinc abundances in 417 Galactic bulge red giants C. R. da Silveira, B. Barbuy, A. C. S. Friaça, V. Hill, M. Zoccali, M. Rafelski, O. A. Gonzalez, D. Minniti, A. Renzini and S. Ortolani A&A, 614 (2018) A149 Published online: 03 July 2018 DOI: 10.1051/0004-6361/201730562