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L. Ferrarese, H. C. Ford, J. Huchra, R. C. Kennicutt Jr., J. R. Mould, S. Sakai, W. L. Freedman, P. B. Stetson, B. F. Madore, B. K. Gibson, J. A. Graham, S. M. Hughes, G. D. Illingworth, D. D. Kelson, L. Macri, K. Sebo, N. A. Silbermann: 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. Astrophysical Journal Supplement, 2000, 128. vsk, nro 2, s. 431-459. doi:10.1086/313391Bibcode:2000ApJS..128..431F(englanniksi)
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G. Giurcin et al: Nearby Optical Galaxies: Selection of the Sample and Identification of Groups. Astrophysical Journal, 2000, 543. vsk, nro 1, s. 178-194. doi:10.1086/317070Bibcode:2000ApJ...543..178G(englanniksi)
L. Ferrarese, H. C. Ford, J. Huchra, R. C. Kennicutt Jr., J. R. Mould, S. Sakai, W. L. Freedman, P. B. Stetson, B. F. Madore, B. K. Gibson, J. A. Graham, S. M. Hughes, G. D. Illingworth, D. D. Kelson, L. Macri, K. Sebo, N. A. Silbermann: 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. Astrophysical Journal Supplement, 2000, 128. vsk, nro 2, s. 431-459. doi:10.1086/313391Bibcode:2000ApJS..128..431F(englanniksi)
