Burns, Jack O.; Hanisch, Robert J.; White, Richard A.; Nelson, Eric R.; Morrisette, Kim A.; Moody, J. Ward (1987-09-01). «A VLA 20 CM survey of poor groups of galaxies». The Astronomical Journal94: 587–617. doi:10.1086/114494. ISSN0004-6256. Bibcode: 1987AJ.....94..587B.
Doe, Stephen M.; Ledlow, Michael J.; Burns, Jack O.; White, Richard A. (1995-07-01). «ROSAT Observations of Five Poor Galaxy Clusters with Extended Radio Sources». The Astronomical Journal110: 46. doi:10.1086/117496. ISSN0004-6256. Bibcode: 1995AJ....110...46D.
Winter, Lisa M.; Lewis, Karen T.; Koss, Michael; Veilleux, Sylvain; Keeney, Brian; Mushotzky, Richard F. (2010-02-01). «Optical Spectral Properties of Swift Burst Alert Telescope Hard X-Ray-Selected Active Galactic Nuclei Sources». The Astrophysical Journal710 (1): 503–539. doi:10.1088/0004-637X/710/1/503. ISSN0004-637X. Bibcode: 2010ApJ...710..503W.
Woo, Jong-Hak; Urry, C. Megan (2002-11-01). «Active Galactic Nucleus Black Hole Masses and Bolometric Luminosities». The Astrophysical Journal579 (2): 530–544. doi:10.1086/342878. ISSN0004-637X. Bibcode: 2002ApJ...579..530W.
Burns, Jack O.; Hanisch, Robert J.; White, Richard A.; Nelson, Eric R.; Morrisette, Kim A.; Moody, J. Ward (1987-09-01). «A VLA 20 CM survey of poor groups of galaxies». The Astronomical Journal94: 587–617. doi:10.1086/114494. ISSN0004-6256. Bibcode: 1987AJ.....94..587B.
Doe, Stephen M.; Ledlow, Michael J.; Burns, Jack O.; White, Richard A. (1995-07-01). «ROSAT Observations of Five Poor Galaxy Clusters with Extended Radio Sources». The Astronomical Journal110: 46. doi:10.1086/117496. ISSN0004-6256. Bibcode: 1995AJ....110...46D.
Winter, Lisa M.; Lewis, Karen T.; Koss, Michael; Veilleux, Sylvain; Keeney, Brian; Mushotzky, Richard F. (2010-02-01). «Optical Spectral Properties of Swift Burst Alert Telescope Hard X-Ray-Selected Active Galactic Nuclei Sources». The Astrophysical Journal710 (1): 503–539. doi:10.1088/0004-637X/710/1/503. ISSN0004-637X. Bibcode: 2010ApJ...710..503W.
Woo, Jong-Hak; Urry, C. Megan (2002-11-01). «Active Galactic Nucleus Black Hole Masses and Bolometric Luminosities». The Astrophysical Journal579 (2): 530–544. doi:10.1086/342878. ISSN0004-637X. Bibcode: 2002ApJ...579..530W.
Burns, Jack O.; Hanisch, Robert J.; White, Richard A.; Nelson, Eric R.; Morrisette, Kim A.; Moody, J. Ward (1987-09-01). «A VLA 20 CM survey of poor groups of galaxies». The Astronomical Journal94: 587–617. doi:10.1086/114494. ISSN0004-6256. Bibcode: 1987AJ.....94..587B.
Doe, Stephen M.; Ledlow, Michael J.; Burns, Jack O.; White, Richard A. (1995-07-01). «ROSAT Observations of Five Poor Galaxy Clusters with Extended Radio Sources». The Astronomical Journal110: 46. doi:10.1086/117496. ISSN0004-6256. Bibcode: 1995AJ....110...46D.
Winter, Lisa M.; Lewis, Karen T.; Koss, Michael; Veilleux, Sylvain; Keeney, Brian; Mushotzky, Richard F. (2010-02-01). «Optical Spectral Properties of Swift Burst Alert Telescope Hard X-Ray-Selected Active Galactic Nuclei Sources». The Astrophysical Journal710 (1): 503–539. doi:10.1088/0004-637X/710/1/503. ISSN0004-637X. Bibcode: 2010ApJ...710..503W.
Woo, Jong-Hak; Urry, C. Megan (2002-11-01). «Active Galactic Nucleus Black Hole Masses and Bolometric Luminosities». The Astrophysical Journal579 (2): 530–544. doi:10.1086/342878. ISSN0004-637X. Bibcode: 2002ApJ...579..530W.