Graham, Alister W. (November 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. S2CID89905.
Graham, Alister W. (November 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. S2CID89905.
Hey, J. S.; Parsons, S. J.; Phillips, J. W. (1948). "An investigation of galactic radiation in the radio spectrum". Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 192 (1030): 425–445. Bibcode:1948RSPSA.192..425H. doi:10.1098/rspa.1948.0017. S2CID121054928.
Baade, W.; Minkowski, R. (1954). "Identification of the Radio Sources in Cassiopeia, Cygnus a, and Puppis A". The Astrophysical Journal. 119: 206. Bibcode:1954ApJ...119..206B. doi:10.1086/145812.
Graham, Alister W. (November 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. S2CID89905.
Hey, J. S.; Parsons, S. J.; Phillips, J. W. (1948). "An investigation of galactic radiation in the radio spectrum". Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 192 (1030): 425–445. Bibcode:1948RSPSA.192..425H. doi:10.1098/rspa.1948.0017. S2CID121054928.
Baade, W.; Minkowski, R. (1954). "Identification of the Radio Sources in Cassiopeia, Cygnus a, and Puppis A". The Astrophysical Journal. 119: 206. Bibcode:1954ApJ...119..206B. doi:10.1086/145812.
Graham, Alister W. (November 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. S2CID89905.
Hey, J. S.; Parsons, S. J.; Phillips, J. W. (1948). "An investigation of galactic radiation in the radio spectrum". Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 192 (1030): 425–445. Bibcode:1948RSPSA.192..425H. doi:10.1098/rspa.1948.0017. S2CID121054928.