Binggeli, B.; Sandage, A.; Tammann, G. A. Studies of the Virgo Cluster. II - A catalog of 2096 galaxies in the Virgo Cluster area.. The Astronomical Journal. 1985-09-01, 90: 1681–1759. Bibcode:1985AJ.....90.1681B. ISSN 0004-6256. doi:10.1086/113874.
Binggeli, B.; Sandage, A.; Tammann, G. A. Studies of the Virgo Cluster. II - A catalog of 2096 galaxies in the Virgo Cluster area.. The Astronomical Journal. 1985-09-01, 90: 1681–1759. Bibcode:1985AJ.....90.1681B. ISSN 0004-6256. doi:10.1086/113874.
NGC 4305 - SA(s)a. The De Vaucouleurs Atlas of Galaxies. [2019-08-09]. (原始内容存档于2021-10-27).
worldcat.org
Binggeli, B.; Sandage, A.; Tammann, G. A. Studies of the Virgo Cluster. II - A catalog of 2096 galaxies in the Virgo Cluster area.. The Astronomical Journal. 1985-09-01, 90: 1681–1759. Bibcode:1985AJ.....90.1681B. ISSN 0004-6256. doi:10.1086/113874.