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 Australia25 (4): 167-175, Bibcode:2008PASA...25..167G, S2CID89905, arXiv:0807.2549, doi:10.1071/AS08013..
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 Australia25 (4): 167-175, Bibcode:2008PASA...25..167G, S2CID89905, arXiv:0807.2549, doi:10.1071/AS08013..
I. D. Karachentsev; M. E. Sharina; A. E. Dolphin; E. K. Grebel et al. (2002). «New distances to galaxies in the Centaurus A group». Astronomy and Astrophysics385 (1): 21-31. Bibcode:2002A&A...385...21K. doi:10.1051/0004-6361:20020042.
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 Australia25 (4): 167-175, Bibcode:2008PASA...25..167G, S2CID89905, arXiv:0807.2549, doi:10.1071/AS08013..
I. D. Karachentsev; M. E. Sharina; A. E. Dolphin; E. K. Grebel et al. (2002). «New distances to galaxies in the Centaurus A group». Astronomy and Astrophysics385 (1): 21-31. Bibcode:2002A&A...385...21K. doi:10.1051/0004-6361:20020042.
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 Australia25 (4): 167-175, Bibcode:2008PASA...25..167G, S2CID89905, arXiv:0807.2549, doi:10.1071/AS08013..