(en) Dong-Woo Kim, Eunhyeuk Kim, Giuseppina Fabbiano et Ginevra Trinchieri, «X-Ray Tail in NGC 7619», The Astrophysical Journal, vol.688, , p.931–944 (ISSN0004-637X, DOI10.1086/592211, lire en ligne, consulté le )
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
Lorenza Levy, James A. Rose, Jacqueline H. van Gorkom et Brian Chaboyer, «The Effect of Cluster Environment on Galaxy Evolution in the Pegasus I Cluster», The Astronomical Journal, vol.133, no3, , p.1104 (DOI10.1086/510723, Bibcode2007AJ....133.1104L, lire en ligne[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])
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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) Dong-Woo Kim, Eunhyeuk Kim, Giuseppina Fabbiano et Ginevra Trinchieri, «X-Ray Tail in NGC 7619», The Astrophysical Journal, vol.688, , p.931–944 (ISSN0004-637X, DOI10.1086/592211, lire en ligne, consulté le )
Lorenza Levy, James A. Rose, Jacqueline H. van Gorkom et Brian Chaboyer, «The Effect of Cluster Environment on Galaxy Evolution in the Pegasus I Cluster», The Astronomical Journal, vol.133, no3, , p.1104 (DOI10.1086/510723, Bibcode2007AJ....133.1104L, lire en ligne[PDF])
Abraham Mahtessian, «Groups of galaxies. III. Some empirical characteristics», Astrophysics, vol.41 #3, , p.308-321 (DOI10.1007/BF03036100, lire en ligne, consulté le )
Lorenza Levy, James A. Rose, Jacqueline H. van Gorkom et Brian Chaboyer, «The Effect of Cluster Environment on Galaxy Evolution in the Pegasus I Cluster», The Astronomical Journal, vol.133, no3, , p.1104 (DOI10.1086/510723, Bibcode2007AJ....133.1104L, lire en ligne[PDF])
(en) Dong-Woo Kim, Eunhyeuk Kim, Giuseppina Fabbiano et Ginevra Trinchieri, «X-Ray Tail in NGC 7619», The Astrophysical Journal, vol.688, , p.931–944 (ISSN0004-637X, DOI10.1086/592211, lire en ligne, consulté le )
Abraham Mahtessian, «Groups of galaxies. III. Some empirical characteristics», Astrophysics, vol.41 #3, , p.308-321 (DOI10.1007/BF03036100, lire en ligne, consulté le )