Ghez, A.; Klein, B.; Morris, M.; Becklin, E (1998). „High Proper-Motion Stars in the Vicinity of Sagittarius A*: Evidence for a Supermassive Black Hole at the Center of Our Galaxy”. The Astrophysical Journal. 509 (2): 678. Bibcode:1998ApJ...509..678G. S2CID18243528. arXiv:astro-ph/9807210. doi:10.1086/306528.
Ghez, A.; Klein, B.; Morris, M.; Becklin, E (1998). „High Proper-Motion Stars in the Vicinity of Sagittarius A*: Evidence for a Supermassive Black Hole at the Center of Our Galaxy”. The Astrophysical Journal. 509 (2): 678. Bibcode:1998ApJ...509..678G. S2CID18243528. arXiv:astro-ph/9807210. doi:10.1086/306528.
Ghez, A.; Klein, B.; Morris, M.; Becklin, E (1998). „High Proper-Motion Stars in the Vicinity of Sagittarius A*: Evidence for a Supermassive Black Hole at the Center of Our Galaxy”. The Astrophysical Journal. 509 (2): 678. Bibcode:1998ApJ...509..678G. S2CID18243528. arXiv:astro-ph/9807210. doi:10.1086/306528.
[1]Архивирано на сајту Wayback Machine (21. октобар 2013) "Supermasivne Crne Rupe", Miroslav Mićić, Astronomska Opservatorija Beograd (pristupljeno 09. 11. 2012.)
Ghez, A.; Klein, B.; Morris, M.; Becklin, E (1998). „High Proper-Motion Stars in the Vicinity of Sagittarius A*: Evidence for a Supermassive Black Hole at the Center of Our Galaxy”. The Astrophysical Journal. 509 (2): 678. Bibcode:1998ApJ...509..678G. S2CID18243528. arXiv:astro-ph/9807210. doi:10.1086/306528.
[1]Архивирано на сајту Wayback Machine (21. октобар 2013) "Supermasivne Crne Rupe", Miroslav Mićić, Astronomska Opservatorija Beograd (pristupljeno 09. 11. 2012.)