Ferrarese, Laura; Ford, Holland C.; Huchra, John; Kennicutt, Robert C., Jr. et al. (2000). “A Database of Cepheid Distance Moduli and Tip of the Red Giant Branch, Globular Cluster Luminosity Function, Planetary Nebula Luminosity Function, and Surface Brightness Fluctuation Data Useful for Distance Determinations”. The Astrophysical Journal Supplement Series128 (2): 431–459. arXiv:astro-ph/9910501. Bibcode: 2000ApJS..128..431F. doi:10.1086/313391.
Ferrarese, Laura; Ford, Holland C.; Huchra, John; Kennicutt, Robert C., Jr. et al. (2000). “A Database of Cepheid Distance Moduli and Tip of the Red Giant Branch, Globular Cluster Luminosity Function, Planetary Nebula Luminosity Function, and Surface Brightness Fluctuation Data Useful for Distance Determinations”. The Astrophysical Journal Supplement Series128 (2): 431–459. arXiv:astro-ph/9910501. Bibcode: 2000ApJS..128..431F. doi:10.1086/313391.
I. D. Karachentsev; M. E. Sharina; A. E. Dolphin; E. K. Grebel et al. (2002). “New distances to galaxies in the Centaurus A group”. Astronomy and Astrophysics385 (1): 21-31. Bibcode: 2002A&A...385...21K. doi:10.1051/0004-6361:20020042.
Ferrarese, Laura; Ford, Holland C.; Huchra, John; Kennicutt, Robert C., Jr. et al. (2000). “A Database of Cepheid Distance Moduli and Tip of the Red Giant Branch, Globular Cluster Luminosity Function, Planetary Nebula Luminosity Function, and Surface Brightness Fluctuation Data Useful for Distance Determinations”. The Astrophysical Journal Supplement Series128 (2): 431–459. arXiv:astro-ph/9910501. Bibcode: 2000ApJS..128..431F. doi:10.1086/313391.
I. D. Karachentsev; M. E. Sharina; A. E. Dolphin; E. K. Grebel et al. (2002). “New distances to galaxies in the Centaurus A group”. Astronomy and Astrophysics385 (1): 21-31. Bibcode: 2002A&A...385...21K. doi:10.1051/0004-6361:20020042.