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
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