(en) P. Fouque, E. Gourgoulhon, P. Chamaraux, G. Paturel, «Groups of galaxies within 80 Mpc. II - The catalogue of groups and group members», Astronomy and Astrophysics Supplement, vol.93, , p.211-233 (Bibcode1992A&AS...93..211F, lire en ligne).
A.M. Garcia, «General study of group membership. II -Determination of nearby groups», Astronomy and Astrophysics Supplement Series, vol.100 #1, , p.47-90 (Bibcode1993A&AS..100...47G, lire en ligne)|format=PDF.
R. A. White, M. Bliton, S. Bhavsar, J. O. Bornmann, M. Ledlow et C. Loken, «A Catalog of Nearby Poor Clusters of Galaxies», Bulletin of the American Astronomical Society, vol.31, , p.979 (Bibcode1999AAS...194.8804W, lire en ligne[PDF])
articles.adsabs.harvard.edu
(en) P. Fouque, E. Gourgoulhon, P. Chamaraux, G. Paturel, «Groups of galaxies within 80 Mpc. II - The catalogue of groups and group members», Astronomy and Astrophysics Supplement, vol.93, , p.211-233 (Bibcode1992A&AS...93..211F, lire en ligne).
A.M. Garcia, «General study of group membership. II -Determination of nearby groups», Astronomy and Astrophysics Supplement Series, vol.100 #1, , p.47-90 (Bibcode1993A&AS..100...47G, lire en ligne)|format=PDF.
R. A. White, M. Bliton, S. Bhavsar, J. O. Bornmann, M. Ledlow et C. Loken, «A Catalog of Nearby Poor Clusters of Galaxies», Bulletin of the American Astronomical Society, vol.31, , p.979 (Bibcode1999AAS...194.8804W, lire en ligne[PDF])