Karachentsev, Igor D.; Karachentseva, Valentina E.; Huchtmeier, Walter K.; Makarov, Dmitry I. (2003). "A Catalog of Neighboring Galaxies". The Astronomical Journal. 127 (4). ss. 2031-2068. Bibcode:2004AJ....127.2031K. doi:10.1086/382905.KB1 bakım: Birden fazla ad: yazar listesi (link)
Karachentsev, Igor D.; Karachentseva, Valentina E.; Huchtmeier, Walter K.; Makarov, Dmitry I. (2003). "A Catalog of Neighboring Galaxies". The Astronomical Journal. 127 (4). ss. 2031-2068. Bibcode:2004AJ....127.2031K. doi:10.1086/382905.KB1 bakım: Birden fazla ad: yazar listesi (link)
Ubeda, L.; Maíz-Apellániz, J.; MacKenty, J. W.. (2004). "Massive Young Star Clusters in NGC 4214". The Formation and Evolution of Massive Young Star Clusters, ASP Conference Series, Vol. 322. Edited by H.J.G.L.M. Lamers, L.J. Smith, and A. Nota. San Francisco: Astronomical Society of the Pacific, 2004. Cilt 322. s. 221. Bibcode:2004ASPC..322..221U.KB1 bakım: Birden fazla ad: yazar listesi (link)