Tracing gas accretion in the Galactic center using isotopic ratiosD. Riquelme, M. A. Amo-Baladrón, J. Martín-Pintado, R. Mauersberger, S. Martín and L. BronfmanA&A, 523 (2010) A51DOI: https://doi.org/10.1051/0004-6361/201015008
