Zn and Cr abundances in damped Lyman alpha systems from the CORALS survey C. J. Akerman, S. L. Ellison, M. Pettini and C. C. Steidel A&A, 440 2 (2005) 499-509 Published online: 01 September 2005 DOI: 10.1051/0004-6361:20052947