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↑P. Fouque, E. Gourgoulhon, P. Chamaraux, G. Paturel(1992).“Groups of galaxies within 80 Mpc. II - The catalogue of groups and group members”.Astronomy and Astrophysics Supplement93: 211-233.Bibcode:1992A&AS...93..211F.
↑A. Garcia(1993).“General study of group membership. II - Determination of nearby groups”.Astronomy and Astrophysics Supplement100: 47-90.Bibcode:1993A&AS..100...47G.