Binggeli, B.; Sandage, A.; Tammann, G. A. (September 1985). "Studies of the Virgo Cluster. II - A catalog of 2096 galaxies in the Virgo Cluster area. V - Luminosity functions of Virgo Cluster galaxies". The Astronomical Journal. 90: 1681. Bibcode:1985AJ.....90.1681B. doi:10.1086/113874. ISSN0004-6256.
Binggeli, B.; Sandage, A.; Tammann, G. A. (September 1985). "Studies of the Virgo Cluster. II - A catalog of 2096 galaxies in the Virgo Cluster area. V - Luminosity functions of Virgo Cluster galaxies". The Astronomical Journal. 90: 1681. Bibcode:1985AJ.....90.1681B. doi:10.1086/113874. ISSN0004-6256.
C., Kraan-Korteweg, R. (March 1982). "A complete sample of Virgo cluster galaxies". Astronomy and Astrophysics Supplement Series. 47: 505. Bibcode:1982A&AS...47..505K. ISSN0365-0138.{{cite journal}}: CS1 maint: multiple names: authors list (link)
Binggeli, B.; Sandage, A.; Tammann, G. A. (September 1985). "Studies of the Virgo Cluster. II - A catalog of 2096 galaxies in the Virgo Cluster area. V - Luminosity functions of Virgo Cluster galaxies". The Astronomical Journal. 90: 1681. Bibcode:1985AJ.....90.1681B. doi:10.1086/113874. ISSN0004-6256.
C., Kraan-Korteweg, R. (March 1982). "A complete sample of Virgo cluster galaxies". Astronomy and Astrophysics Supplement Series. 47: 505. Bibcode:1982A&AS...47..505K. ISSN0365-0138.{{cite journal}}: CS1 maint: multiple names: authors list (link)