The CORALS survey I: New estimates of the number density and gas content of damped Lyman alpha systems free from dust biasS. L. Ellison, L. Yan, I. M. Hook, M. Pettini, J. V. Wall and P. ShaverA&A, 379 2 (2001) 393-406DOI: https://doi.org/10.1051/0004-6361:20011281
