Metallicity gradients in local Universe galaxies: Time evolution and effects of radial migration Laura Magrini, Lodovico Coccato, Letizia Stanghellini, Viviana Casasola and Daniele Galli A&A, 588 (2016) A91 Published online: 23 March 2016 DOI: 10.1051/0004-6361/201527799