Evolution of the dust-to-metals ratio in high-redshift galaxies probed by GRB-DLAs P. Wiseman, P. Schady, J. Bolmer, T. Krühler, R. M. Yates, J. Greiner and J. P. U. Fynbo A&A, 599 (2017) A24 Published online: 21 February 2017 DOI: 10.1051/0004-6361/201629228