Janowiecki Steven; Mihos, J. Christopher; Harding Paul; Feldmeier John J.; và đồng nghiệp (2010). "Diffuse Tidal Structures in the Halos of Virgo Ellipticals". The Astrophysical Journal. Quyển715 số2. tr.972–985. arXiv:1004.1473. Bibcode:2010ApJ...715..972J. doi:10.1088/0004-637X/715/2/972.
Machacek M.; Nulsen P. E. J.; Jones C.; Forman W. R. (2014). "Chandra Observations of Nuclear Outflows in the Elliptical Galaxy NGC 4552 in the Virgo Cluster". The Astrophysical Journal. Quyển648 số2. tr.947–955. arXiv:astro-ph/0604406. Bibcode:2006ApJ...648..947M. doi:10.1086/505963.
Graham, Alister W. (tháng 11 năm 2008), "Populating the Galaxy Velocity Dispersion - Supermassive Black Hole Mass Diagram: A Catalogue of (Mbh, σ) Values", Publications of the Astronomical Society of Australia, 25 (4): 167–175, arXiv:0807.2549, Bibcode:2008PASA...25..167G, doi:10.1071/AS08013.
Tamura Naoyuki; Sharples Ray M.; Arimoto Nobuo; Onodera Masato; và đồng nghiệp (2006). "A Subaru/Suprime-Cam wide-field survey of globular cluster populations around M87 - I. Observation, data analysis and luminosity function". Monthly Notices of the Royal Astronomical Society. Quyển373 số2. tr.588–600. arXiv:astro-ph/0609067. Bibcode:2006MNRAS.373..588T. doi:10.1111/j.1365-2966.2006.11067.x.
Janowiecki Steven; Mihos, J. Christopher; Harding Paul; Feldmeier John J.; và đồng nghiệp (2010). "Diffuse Tidal Structures in the Halos of Virgo Ellipticals". The Astrophysical Journal. Quyển715 số2. tr.972–985. arXiv:1004.1473. Bibcode:2010ApJ...715..972J. doi:10.1088/0004-637X/715/2/972.
Machacek M.; Nulsen P. E. J.; Jones C.; Forman W. R. (2014). "Chandra Observations of Nuclear Outflows in the Elliptical Galaxy NGC 4552 in the Virgo Cluster". The Astrophysical Journal. Quyển648 số2. tr.947–955. arXiv:astro-ph/0604406. Bibcode:2006ApJ...648..947M. doi:10.1086/505963.
Graham, Alister W. (tháng 11 năm 2008), "Populating the Galaxy Velocity Dispersion - Supermassive Black Hole Mass Diagram: A Catalogue of (Mbh, σ) Values", Publications of the Astronomical Society of Australia, 25 (4): 167–175, arXiv:0807.2549, Bibcode:2008PASA...25..167G, doi:10.1071/AS08013.
Tamura Naoyuki; Sharples Ray M.; Arimoto Nobuo; Onodera Masato; và đồng nghiệp (2006). "A Subaru/Suprime-Cam wide-field survey of globular cluster populations around M87 - I. Observation, data analysis and luminosity function". Monthly Notices of the Royal Astronomical Society. Quyển373 số2. tr.588–600. arXiv:astro-ph/0609067. Bibcode:2006MNRAS.373..588T. doi:10.1111/j.1365-2966.2006.11067.x.
Janowiecki Steven; Mihos, J. Christopher; Harding Paul; Feldmeier John J.; và đồng nghiệp (2010). "Diffuse Tidal Structures in the Halos of Virgo Ellipticals". The Astrophysical Journal. Quyển715 số2. tr.972–985. arXiv:1004.1473. Bibcode:2010ApJ...715..972J. doi:10.1088/0004-637X/715/2/972.
Machacek M.; Nulsen P. E. J.; Jones C.; Forman W. R. (2014). "Chandra Observations of Nuclear Outflows in the Elliptical Galaxy NGC 4552 in the Virgo Cluster". The Astrophysical Journal. Quyển648 số2. tr.947–955. arXiv:astro-ph/0604406. Bibcode:2006ApJ...648..947M. doi:10.1086/505963.
Graham, Alister W. (tháng 11 năm 2008), "Populating the Galaxy Velocity Dispersion - Supermassive Black Hole Mass Diagram: A Catalogue of (Mbh, σ) Values", Publications of the Astronomical Society of Australia, 25 (4): 167–175, arXiv:0807.2549, Bibcode:2008PASA...25..167G, doi:10.1071/AS08013.
Tamura Naoyuki; Sharples Ray M.; Arimoto Nobuo; Onodera Masato; và đồng nghiệp (2006). "A Subaru/Suprime-Cam wide-field survey of globular cluster populations around M87 - I. Observation, data analysis and luminosity function". Monthly Notices of the Royal Astronomical Society. Quyển373 số2. tr.588–600. arXiv:astro-ph/0609067. Bibcode:2006MNRAS.373..588T. doi:10.1111/j.1365-2966.2006.11067.x.