The extinction law at high redshift and its implications S. Gallerani, R. Maiolino, Y. Juarez, T. Nagao, A. Marconi, S. Bianchi, R. Schneider, F. Mannucci, T. Oliva, C. J. Willott et al. (2 more) A&A, 523 (2010) A85 Published online: 18 November 2010 DOI: 10.1051/0004-6361/201014721