The Na-O anticorrelation in horizontal branch stars - II. NGC 1851R. G. Gratton, S. Lucatello, E. Carretta, A. Bragaglia, V. D’Orazi, Y. Al Momany, A. Sollima, M. Salaris and S. CassisiA&A, 539 (2012) A19DOI: https://doi.org/10.1051/0004-6361/201118491
