^R. B. Tully (1988). Nearby Galaxies Catalog. Cambridge: Cambridge University Press. ISBN0-521-35299-1
^P. Fouque, E. Gourgoulhon, P. Chamaraux, G. Paturel; Gourgoulhon; Chamaraux; 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.