Sadoun, Raphael; Colin, Jacques. -σ relation between supermassive black holes and the velocity dispersion of globular cluster systems. Monthly Notices of the Royal Astronomical Society: Letters. 11 October 2012, 426 (1): L51–L55. Bibcode:2012MNRAS.426L..51S. arXiv:1204.0144. doi:10.1111/j.1745-3933.2012.01321.x.
Sadoun, Raphael; Colin, Jacques. -σ relation between supermassive black holes and the velocity dispersion of globular cluster systems. Monthly Notices of the Royal Astronomical Society: Letters. 11 October 2012, 426 (1): L51–L55. Bibcode:2012MNRAS.426L..51S. arXiv:1204.0144. doi:10.1111/j.1745-3933.2012.01321.x.
Sadoun, Raphael; Colin, Jacques. -σ relation between supermassive black holes and the velocity dispersion of globular cluster systems. Monthly Notices of the Royal Astronomical Society: Letters. 11 October 2012, 426 (1): L51–L55. Bibcode:2012MNRAS.426L..51S. arXiv:1204.0144. doi:10.1111/j.1745-3933.2012.01321.x.