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])
(en) A. A. Yeghiazaryan, T. A. Nazaryan et A. A. Hakobyan, «Hα Velocity Fields and Galaxy Interaction in the Quartet of Galaxies NGC 7769, 7770, 7771 and 7771A», Journal of Astrophysics and Astronomy, vol.37, , p.1 (ISSN0250-6335, DOI10.1007/s12036-016-9369-x, lire en ligne, consulté le )
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.
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])
(en) A. A. Yeghiazaryan, T. A. Nazaryan et A. A. Hakobyan, «Hα Velocity Fields and Galaxy Interaction in the Quartet of Galaxies NGC 7769, 7770, 7771 and 7771A», Journal of Astrophysics and Astronomy, vol.37, , p.1 (ISSN0250-6335, DOI10.1007/s12036-016-9369-x, lire en ligne, consulté le )
(en) A. A. Yeghiazaryan, T. A. Nazaryan et A. A. Hakobyan, «Hα Velocity Fields and Galaxy Interaction in the Quartet of Galaxies NGC 7769, 7770, 7771 and 7771A», Journal of Astrophysics and Astronomy, vol.37, , p.1 (ISSN0250-6335, DOI10.1007/s12036-016-9369-x, lire en ligne, consulté le )