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Bililign T. Dullo, Johan H. Knapen, David RA Williams, Robert J. Beswick, Georges Bendo, Ranieri D. Baldi, Megan Argo, Ian McHardy, Tom Muxlow et J. Westcott, « The nuclear activity and central structure of the elliptical galaxy NGC 5322 », Monthly Notices of the Royal Astronomical Society, vol. 475, no 4, , p. 4670-4682 (Bibcode2018MNRAS.475.4670D, lire en ligne [PDF])
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)
Abraham Mahtessian, « Groups of galaxies. III. Some empirical characteristics », Astrophysics, vol. 41 #3, , p. 308-321 (DOI10.1007/BF03036100, lire en ligne, consulté le )
