Beifiori, A.; Sarzi, M.; Corsini, E. M.; Bontà, E. Dalla; Pizzella, A.; Coccato, L.; Bertola, F. (10 February 2009). "Upper Limits on the Masses of 105 Supermassive Black Holes from Hubble Space Telescope/Space Telescope Imaging Spectrograph Archival Data". The Astrophysical Journal. 692 (1): 856–868. arXiv:0809.5103. Bibcode:2009ApJ...692..856B. doi:10.1088/0004-637X/692/1/856. S2CID54903233.
Beifiori, A.; Sarzi, M.; Corsini, E. M.; Bontà, E. Dalla; Pizzella, A.; Coccato, L.; Bertola, F. (10 February 2009). "Upper Limits on the Masses of 105 Supermassive Black Holes from Hubble Space Telescope/Space Telescope Imaging Spectrograph Archival Data". The Astrophysical Journal. 692 (1): 856–868. arXiv:0809.5103. Bibcode:2009ApJ...692..856B. doi:10.1088/0004-637X/692/1/856. S2CID54903233.
Buta, R.; Purcell, Guy B. (February 1998). "NGC 3081: Surface Photometry and Kinematics of a Classic Resonance Ring Barred Galaxy". The Astronomical Journal. 115 (2): 484–501. Bibcode:1998AJ....115..484B. doi:10.1086/300225. S2CID123499637.
Buta, Ronald J.; Byrd, Gene G.; Freeman, Tarsh (April 2004). "A Hubble Space Telescope Study of Star Formation in the Inner Resonance Ring of NGC 3081". The Astronomical Journal. 127 (4): 1982–2001. Bibcode:2004AJ....127.1982B. doi:10.1086/382239. S2CID119572372.
Beifiori, A.; Sarzi, M.; Corsini, E. M.; Bontà, E. Dalla; Pizzella, A.; Coccato, L.; Bertola, F. (10 February 2009). "Upper Limits on the Masses of 105 Supermassive Black Holes from Hubble Space Telescope/Space Telescope Imaging Spectrograph Archival Data". The Astrophysical Journal. 692 (1): 856–868. arXiv:0809.5103. Bibcode:2009ApJ...692..856B. doi:10.1088/0004-637X/692/1/856. S2CID54903233.
Buta, R.; Purcell, Guy B. (February 1998). "NGC 3081: Surface Photometry and Kinematics of a Classic Resonance Ring Barred Galaxy". The Astronomical Journal. 115 (2): 484–501. Bibcode:1998AJ....115..484B. doi:10.1086/300225. S2CID123499637.
Buta, Ronald J.; Byrd, Gene G.; Freeman, Tarsh (April 2004). "A Hubble Space Telescope Study of Star Formation in the Inner Resonance Ring of NGC 3081". The Astronomical Journal. 127 (4): 1982–2001. Bibcode:2004AJ....127.1982B. doi:10.1086/382239. S2CID119572372.
Beifiori, A.; Sarzi, M.; Corsini, E. M.; Bontà, E. Dalla; Pizzella, A.; Coccato, L.; Bertola, F. (10 February 2009). "Upper Limits on the Masses of 105 Supermassive Black Holes from Hubble Space Telescope/Space Telescope Imaging Spectrograph Archival Data". The Astrophysical Journal. 692 (1): 856–868. arXiv:0809.5103. Bibcode:2009ApJ...692..856B. doi:10.1088/0004-637X/692/1/856. S2CID54903233.
Buta, R.; Purcell, Guy B. (February 1998). "NGC 3081: Surface Photometry and Kinematics of a Classic Resonance Ring Barred Galaxy". The Astronomical Journal. 115 (2): 484–501. Bibcode:1998AJ....115..484B. doi:10.1086/300225. S2CID123499637.
Buta, Ronald J.; Byrd, Gene G.; Freeman, Tarsh (April 2004). "A Hubble Space Telescope Study of Star Formation in the Inner Resonance Ring of NGC 3081". The Astronomical Journal. 127 (4): 1982–2001. Bibcode:2004AJ....127.1982B. doi:10.1086/382239. S2CID119572372.