Alpha element abundances and gradients in the Milky Way bulge from FLAMES-GIRAFFE spectra of 650 K giants
O. A. Gonzalez, M. Rejkuba, M. Zoccali, V. Hill, G. Battaglia, C. Babusiaux, D. Minniti, B. Barbuy, A. Alves-Brito, A. Renzini, A. Gomez and S. Ortolani
