M. Gitti, G. Brunetti, R. Cassano, and S. Ettori. (2018)cite arxiv:1806.05751Comment: Accepted for publication in A&A; 9 pages, 9 figures. Revised to match the corrected version after language editing.
S. McGaugh. (2011)cite arxiv:1107.2934Comment: Astronomical Journal, in press. Added new figure (7 total); new version matches accepted version. Electronic data available at http://www.astro.umd.edu/~ssm/data/gasrichdatatable.txt.
B. Husemann, and C. Harrison. (2018)cite arxiv:1802.10304Comment: Author's version of Nature Astronomy Meeting Report. View-only version of full text publicly available at this link: http://rdcu.be/HUTV.