Karachentsev, Igor D.; Karachentseva, Valentina E.; Huchtmeier, Walter K.; Makarov, Dmitry I. (2003). «A Catalog of Neighboring Galaxies». The Astronomical Journal127 (4): 2031-2068. Bibcode:2004AJ....127.2031K. doi:10.1086/382905.
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Karachentsev, Igor D.; Karachentseva, Valentina E.; Huchtmeier, Walter K.; Makarov, Dmitry I. (2003). «A Catalog of Neighboring Galaxies». The Astronomical Journal127 (4): 2031-2068. Bibcode:2004AJ....127.2031K. doi:10.1086/382905.