The metal content of bulge field stars from FLAMES-GIRAFFE spectra: I. Stellar parameters and iron abundances - Zoccali, M; Hill, V; Lecureur, A; Barbuy, Beatriz Leonor Silveira; Renzini, A; Minniti, D; Gómez, A; Ortolani, S (Astronomy & Astrophysics, 2008)