Ghez, A. M.; et al. (1998-12), “High Proper-Motion Stars in the Vicinity of Sagittarius A*: Evidence for a Supermassive Black Hole at the Center of Our Galaxy”, Astrophysical Journal509 (2): 678-686, Bibcode: 1998ApJ...509..678G, doi:10.1086/306528
Martins, F.; et al. (2008-01), “On the Nature of the Fast-Moving Star S2 in the Galactic Center”, Astrophysical Journal Letters672 (2): L119, Bibcode: 2008ApJ...672L.119M, doi:10.1086/526768
Paumard, T.; et al. (2006-06), “The Two Young Star Disks in the Central Parsec of the Galaxy: Properties, Dynamics, and Formation”, Astrophysical Journal643 (2): 1011-1035, Bibcode: 2006ApJ...643.1011P, doi:10.1086/503273
Schödel, R.; et al. (2003-10), “Stellar Dynamics in the Central Arcsecond of Our Galaxy”, Astrophysical Journal596 (2): 1015-1034, Bibcode: 2003ApJ...596.1015S, doi:10.1086/378122
Eisenhauer, F.; et al. (2005-07), “SINFONI in the Galactic Center: Young Stars and Infrared Flares in the Central Light-Month”, Astrophysical Journal628 (1): 246-259, Bibcode: 2005ApJ...628..246E, doi:10.1086/430667
Ghez, A. M.; et al. (2008-12), “Measuring Distance and Properties of the Milky Way's Central Supermassive Black Hole with Stellar Orbits”, Astrophysical Journal689 (2): 1044-1062, Bibcode: 2008ApJ...689.1044G, doi:10.1086/592738
Sabha, N.; et al. (2012-09), “The S-star cluster at the center of the Milky Way. On the nature of diffuse NIR emission in the inner tenth of a parsec”, Astronomy and Astrophysics545: A70, Bibcode: 2012A&A...545A..70S, doi:10.1051/0004-6361/201219203
Bozza, V.; Mancini, L. (2004-08), “Gravitational Lensing by Black Holes: A Comprehensive Treatment and the Case of the Star S2”, Astrophysical Journal611 (2): 1045-1053, Bibcode: 2004ApJ...611.1045B, doi:10.1086/422309
Weinberg, Nevin N.; Milosavljević, Miloš; Ghez, Andrea M. (2005-04), “Stellar Dynamics at the Galactic Center with an Extremely Large Telescope”, Astrophysical Journal622 (2): 878-891, Bibcode: 2005ApJ...622..878W, doi:10.1086/428079
Zucker, Shay; Alexander, Tal (2007-01), “Spectroscopic Binary Mass Determination Using Relativity”, Astrophysical Journal654 (1): L83-L86, Bibcode: 2007ApJ...654L..83Z, doi:10.1086/510799
Ghez, A. M.; et al. (1998-12), “High Proper-Motion Stars in the Vicinity of Sagittarius A*: Evidence for a Supermassive Black Hole at the Center of Our Galaxy”, Astrophysical Journal509 (2): 678-686, Bibcode: 1998ApJ...509..678G, doi:10.1086/306528
Martins, F.; et al. (2008-01), “On the Nature of the Fast-Moving Star S2 in the Galactic Center”, Astrophysical Journal Letters672 (2): L119, Bibcode: 2008ApJ...672L.119M, doi:10.1086/526768
Paumard, T.; et al. (2006-06), “The Two Young Star Disks in the Central Parsec of the Galaxy: Properties, Dynamics, and Formation”, Astrophysical Journal643 (2): 1011-1035, Bibcode: 2006ApJ...643.1011P, doi:10.1086/503273
Schödel, R.; et al. (2003-10), “Stellar Dynamics in the Central Arcsecond of Our Galaxy”, Astrophysical Journal596 (2): 1015-1034, Bibcode: 2003ApJ...596.1015S, doi:10.1086/378122
Eisenhauer, F.; et al. (2005-07), “SINFONI in the Galactic Center: Young Stars and Infrared Flares in the Central Light-Month”, Astrophysical Journal628 (1): 246-259, Bibcode: 2005ApJ...628..246E, doi:10.1086/430667
Ghez, A. M.; et al. (2008-12), “Measuring Distance and Properties of the Milky Way's Central Supermassive Black Hole with Stellar Orbits”, Astrophysical Journal689 (2): 1044-1062, Bibcode: 2008ApJ...689.1044G, doi:10.1086/592738
Sabha, N.; et al. (2012-09), “The S-star cluster at the center of the Milky Way. On the nature of diffuse NIR emission in the inner tenth of a parsec”, Astronomy and Astrophysics545: A70, Bibcode: 2012A&A...545A..70S, doi:10.1051/0004-6361/201219203
Bozza, V.; Mancini, L. (2004-08), “Gravitational Lensing by Black Holes: A Comprehensive Treatment and the Case of the Star S2”, Astrophysical Journal611 (2): 1045-1053, Bibcode: 2004ApJ...611.1045B, doi:10.1086/422309
Weinberg, Nevin N.; Milosavljević, Miloš; Ghez, Andrea M. (2005-04), “Stellar Dynamics at the Galactic Center with an Extremely Large Telescope”, Astrophysical Journal622 (2): 878-891, Bibcode: 2005ApJ...622..878W, doi:10.1086/428079
Zucker, Shay; Alexander, Tal (2007-01), “Spectroscopic Binary Mass Determination Using Relativity”, Astrophysical Journal654 (1): L83-L86, Bibcode: 2007ApJ...654L..83Z, doi:10.1086/510799