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.
(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)
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
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.
(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)
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])
A. Beifiori, M. Sarzi, E.M. Corsini, E. Dalla Bontà, A. Pizzella, L. Coccato et F. Bertola, «UPPER LIMITS ON THE MASSES OF 105 SUPERMASSIVE BLACK HOLES FROM HUBBLE SPACE TELESCOPE/SPACE TELESCOPE IMAGING SPECTROGRAPH ARCHIVAL DATA», The Astrophysical Journal, vol.692, no1, , p.856-868 (DOI10.1088/0004-637X/692/1/856, lire en ligne)
Abraham Mahtessian, «Groups of galaxies. III. Some empirical characteristics», Astrophysics, vol.41, no3, , p.308-321 (DOI10.1007/BF03036100, lire en ligne, consulté le ).
A. Beifiori, M. Sarzi, E.M. Corsini, E. Dalla Bontà, A. Pizzella, L. Coccato et F. Bertola, «UPPER LIMITS ON THE MASSES OF 105 SUPERMASSIVE BLACK HOLES FROM HUBBLE SPACE TELESCOPE/SPACE TELESCOPE IMAGING SPECTROGRAPH ARCHIVAL DATA», The Astrophysical Journal, vol.692, no1, , p.856-868 (DOI10.1088/0004-637X/692/1/856, lire en ligne)
Abraham Mahtessian, «Groups of galaxies. III. Some empirical characteristics», Astrophysics, vol.41, no3, , p.308-321 (DOI10.1007/BF03036100, lire en ligne, consulté le ).