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articles.adsabs.harvard.edu
Henry C. Ferguson, «Population studies in groups and clusters of galaxies. II - A catalog of galaxies in the central 3.5 deg of the Fornax Cluster», Astronomical Journal, vol.98, , p.367-418, p377 (DOI10.1086/115152, Bibcode1989AJ.....98..367F, lire en ligne)
Henry C. Ferguson, «Population studies in groups and clusters of galaxies. II - A catalog of galaxies in the central 3.5 deg of the Fornax Cluster», Astronomical Journal, vol.98, , p.367-418, p377 (DOI10.1086/115152, Bibcode1989AJ.....98..367F, lire en ligne)