Proton capture elements in the globular cluster NGC 2808 - I. First detection of large variations in sodium abundances along the Red Giant BranchE. Carretta, A. Bragaglia, C. Cacciari and E. RossettiA&A, 410 1 (2003) 143-154DOI: https://doi.org/10.1051/0004-6361:20031315
