參考資料
- ^ R. W. Sinnott, editor. The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer. Sky Publishing Corporation and Cambridge University Press. 1988. ISBN 0-933-34651-4.
- ^ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 NASA/IPAC Extragalactic Database. Results for NGC 5474. [2006-09-20]. (原始内容存档于2011-05-14).
- ^ 3.0 3.1 3.2 3.3 Drozdovsky, I. O.; Karachentsev, I. D. Photometric distances to six bright resolved galaxies. Astronomy and Astrophysics Supplement. 2000, 142: 425–432. doi:10.1051/aas:2000155.
- ^ A. Sandage, J. Bedke. Carnegie Atlas of Galaxies. Washington, D.C.: Carnegie Institution of Washington. 1994. ISBN 0-87279-667-1.
- ^ 5.0 5.1 R. M. Gonzalez Delgado, E. Perez, C. Tadhunter J. M. Vilchez, J. M. Rodriguez-Espinosa. H II Region Population in a Sample of Nearby Galaxies with Nuclear Activity. I. Data and General Results. Astrophysical Journal Supplement. 2000, 108: 155 [2009-04-08]. doi:10.1086/312951. (原始内容存档于2019-09-30).