Ghez, A. M.; Salim, S.; Weinberg, N. N.; Lu, J. R.; Do, T.; Dunn, J. K.; Matthews, K.; Morris, M. et al. (December 20, 2008). “Measuring Distance and Properties of the Milky Way's Central Supermassive Black Hole with Stellar Orbits”. The Astrophysical Journal689 (2): 1044–1062. arXiv:0808.2870. Bibcode: 2008ApJ...689.1044G. doi:10.1086/592738.
Ghez, A. M.; Salim, S.; Weinberg, N. N.; Lu, J. R.; Do, T.; Dunn, J. K.; Matthews, K.; Morris, M. et al. (December 20, 2008). “Measuring Distance and Properties of the Milky Way's Central Supermassive Black Hole with Stellar Orbits”. The Astrophysical Journal689 (2): 1044–1062. arXiv:0808.2870. Bibcode: 2008ApJ...689.1044G. doi:10.1086/592738.
Ghez, A. M.; Salim, S.; Weinberg, N. N.; Lu, J. R.; Do, T.; Dunn, J. K.; Matthews, K.; Morris, M. et al. (December 20, 2008). “Measuring Distance and Properties of the Milky Way's Central Supermassive Black Hole with Stellar Orbits”. The Astrophysical Journal689 (2): 1044–1062. arXiv:0808.2870. Bibcode: 2008ApJ...689.1044G. doi:10.1086/592738.