I. D. Karachentsev, V. E. Karachentseva, W. K. Huchtmeier, D. I. Markarov (2004). ”A Catalog of Neighboring Galaxies”. Astronomical Journal 127 (4): sid. 2031–2068. doi:10.1086/382905. Bibcode: 2004AJ....127.2031K.
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I. D. Karachentsev, V. E. Karachentseva, W. K. Huchtmeier, D. I. Markarov (2004). ”A Catalog of Neighboring Galaxies”. Astronomical Journal 127 (4): sid. 2031–2068. doi:10.1086/382905. Bibcode: 2004AJ....127.2031K.