X-shooter spectroscopy of young stellar objects - VI. H i line decrements S. Antoniucci, B. Nisini, T. Giannini, E. Rigliaco, J. M. Alcalá, A. Natta and B. Stelzer A&A, 599 (2017) A105 Published online: 09 March 2017 DOI: 10.1051/0004-6361/201629683