First determination of s-process element abundances in pre-main sequence clusters - Y, Zr, La, and Ce in IC 2391, the Argus association, and IC 2602V. D’Orazi, G. M. De Silva and C. F. H. MeloA&A, 598 (2017) A86DOI: https://doi.org/10.1051/0004-6361/201629888