Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) N. Kanekar and W. M. Lane and E. Momjian and F. H. Briggs and J. N. Chengalur,The covering factor of high-redshift damped Lyman-α systems,Monthly Notices of the Royal Astronomical Society: Letters,1745-3925,Oxford University Press (OUP),2009-03-01,394,1,L61-L65,https://cir.nii.ac.jp/crid/1361418521019988992,https://doi.org/10.1111/j.1745-3933.2008.00610.x