Ferrarese et al. 2000 Ferrarese, Laura; Ford, Holland C.; Huchra, John; Kennicutt, Robert C. Jr.; Mould, Jeremy R.; Sakai, Shoko; Freedman, Wendy L.; Stetson, Peter B.; 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 Series, 128 (2): 431–459, arXiv:astro-ph/9910501, Bibcode:2000ApJS..128..431F, doi:10.1086/313391
Ferrarese et al. 2000 Ferrarese, Laura; Ford, Holland C.; Huchra, John; Kennicutt, Robert C. Jr.; Mould, Jeremy R.; Sakai, Shoko; Freedman, Wendy L.; Stetson, Peter B.; 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 Series, 128 (2): 431–459, arXiv:astro-ph/9910501, Bibcode:2000ApJS..128..431F, doi:10.1086/313391
Ferrarese et al. 2000 Ferrarese, Laura; Ford, Holland C.; Huchra, John; Kennicutt, Robert C. Jr.; Mould, Jeremy R.; Sakai, Shoko; Freedman, Wendy L.; Stetson, Peter B.; 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 Series, 128 (2): 431–459, arXiv:astro-ph/9910501, Bibcode:2000ApJS..128..431F, doi:10.1086/313391