Gérard de Vaucouleurs, « Nearby Groups of Galaxies », Galaxies and the Universe. Edited by Allan Sandage, Mary Sandage, and Jerome Kristian, with an index prepared by Gustav A. Tammann., University of Chicago Press (Stars and Stellar Systems), vol. 9, (Bibcode1975gaun.book..557D, lire en ligne [html])
L. Reduzzi et E. Rampazzo, « Candidates for a southern extension of the Karachentsev catalogue of isolated pairs of galaxies. », Astrophysical Letters and Communications, vol. 30, , p. 1-229 (Bibcode1995ApL&C..30....1R, lire en ligne [PDF])
(en) G. de Vaucouleurs, A. de Vaucouleurs et J.R. Corwin, Second reference catalogue of bright galaxies, The University of Texas monographs in astronomy, , 396 p. (ISBN 0292755074, 9780292755079[à vérifier : ISBN invalide], Bibcode1976RC2...C......0D)
Gérard de Vaucouleurs, « Nearby Groups of Galaxies », Galaxies and the Universe. Edited by Allan Sandage, Mary Sandage, and Jerome Kristian, with an index prepared by Gustav A. Tammann., University of Chicago Press (Stars and Stellar Systems), vol. 9, (Bibcode1975gaun.book..557D, lire en ligne [html])
articles.adsabs.harvard.edu
L. Reduzzi et E. Rampazzo, « Candidates for a southern extension of the Karachentsev catalogue of isolated pairs of galaxies. », Astrophysical Letters and Communications, vol. 30, , p. 1-229 (Bibcode1995ApL&C..30....1R, lire en ligne [PDF])
A. Sandage et G. A. Tammann, « Steps toward the Hubble constant. V. The Hubble constant from nearby galaxies and the regularity of the local velocity field. », Astrophysical Journal, vol. 196, no 1, , p. 313-328 (lire en ligne [PDF])