Ellison, S. L.; Yan, L.; Hook, I. M.; Pettini, M.; Wall, J. V.; Shaver, P. (2001). The CORALS survey I: New estimates of the number density and gas content of damped Lyman alpha systems free from dust bias. Astronomy and Astrophysics. 379: 393—406. arXiv:astro-ph/0109205. Bibcode:2001A&A...379..393E. doi:10.1051/0004-6361:20011281.
Ellison, Sara L.; Patton, David R.; Mendel, J. Trevor; Scudder, Jillian M. (2008). Galaxy pairs in the Sloan Digital Sky Survey – IV. Interactions trigger active galactic nuclei. Monthly Notices of the Royal Astronomical Society. 418: 2043—2053. arXiv:1108.2711. Bibcode:2011MNRAS.418.2043E. doi:10.1088/0004-6256/135/5/1877.
Ellison, S. L.; Yan, L.; Hook, I. M.; Pettini, M.; Wall, J. V.; Shaver, P. (2001). The CORALS survey I: New estimates of the number density and gas content of damped Lyman alpha systems free from dust bias. Astronomy and Astrophysics. 379: 393—406. arXiv:astro-ph/0109205. Bibcode:2001A&A...379..393E. doi:10.1051/0004-6361:20011281.
Ellison, Sara L.; Patton, David R.; Mendel, J. Trevor; Scudder, Jillian M. (2008). Galaxy pairs in the Sloan Digital Sky Survey – IV. Interactions trigger active galactic nuclei. Monthly Notices of the Royal Astronomical Society. 418: 2043—2053. arXiv:1108.2711. Bibcode:2011MNRAS.418.2043E. doi:10.1088/0004-6256/135/5/1877.
Ellison, S. L.; Yan, L.; Hook, I. M.; Pettini, M.; Wall, J. V.; Shaver, P. (2001). The CORALS survey I: New estimates of the number density and gas content of damped Lyman alpha systems free from dust bias. Astronomy and Astrophysics. 379: 393—406. arXiv:astro-ph/0109205. Bibcode:2001A&A...379..393E. doi:10.1051/0004-6361:20011281.
Ellison, Sara L.; Patton, David R.; Mendel, J. Trevor; Scudder, Jillian M. (2008). Galaxy pairs in the Sloan Digital Sky Survey – IV. Interactions trigger active galactic nuclei. Monthly Notices of the Royal Astronomical Society. 418: 2043—2053. arXiv:1108.2711. Bibcode:2011MNRAS.418.2043E. doi:10.1088/0004-6256/135/5/1877.