The thick disk rotation-metallicity correlation as a fossil of an “inverse chemical gradient” in the early GalaxyA. Curir, M. G. Lattanzi, A. Spagna, F. Matteucci, G. Murante, P. Re Fiorentin and E. SpitoniA&A, 545 (2012) A133DOI: https://doi.org/10.1051/0004-6361/201118558
