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(en)M. Machaceck, A. Dosaj., W. Forman, C. Jones, M. Markevitch, A. Vikhlinin, A. Warmflash et R. Kraft, « Infall of the Elliptical Galaxy NGC 1404 into the Fornax Cluster », The Astrophysical Journal, vol. 621, no 2, , p. 663–672 (DOI10.1086/427548, Bibcode2005ApJ...621..663M, arXivastro-ph/0408159, lire en ligne)