The s process in AGB stars as constrained by a large sample of barium stars B. Cseh, M. Lugaro, V. D’Orazi, D. B. de Castro, C. B. Pereira, A. I. Karakas, L. Molnár, E. Plachy, R. Szabó, M. Pignatari and S. Cristallo A&A, 620 (2018) A146 Published online: 10 December 2018 DOI: 10.1051/0004-6361/201834079