Extinction properties of the X-ray bright/optically faint afterglow of GRB 020405 G. Stratta, R. Perna, D. Lazzati, F. Fiore, L. A. Antonelli and M. L. Conciatore A&A, 441 1 (2005) 83-88 Published online: 13 September 2005 DOI: 10.1051/0004-6361:20053302