Eigenbrod, A.; Courbin, F.; Meylan, G.; Agol, E.; Anguita, T.; Schmidt, R. W.; Wambsganss, J. (2008). "Microlensing variability in the gravitationally lensed quasar QSO 2237+0305=the Einstein Cross. II. Energy profile of the accretion disk". Astronomy & Astrophysics. 490 (3): 933–943. arXiv:0810.0011. Bibcode:2008A&A...490..933E. doi:10.1051/0004-6361:200810729. S2CID14230245.
Lightman, Alan P.; Eardley, Douglas M. (1974). "Black Holes in Binary Systems: Instability of Disk Accretion". The Astrophysical Journal. 187: L1. Bibcode:1974ApJ...187L...1L. doi:10.1086/181377.
Eigenbrod, A.; Courbin, F.; Meylan, G.; Agol, E.; Anguita, T.; Schmidt, R. W.; Wambsganss, J. (2008). "Microlensing variability in the gravitationally lensed quasar QSO 2237+0305=the Einstein Cross. II. Energy profile of the accretion disk". Astronomy & Astrophysics. 490 (3): 933–943. arXiv:0810.0011. Bibcode:2008A&A...490..933E. doi:10.1051/0004-6361:200810729. S2CID14230245.
Shakura, N. I.; Sunyaev, R. A. (1973). "Black Holes in Binary Systems. Observational Appearance". Astronomy and Astrophysics. 24: 337–355. Bibcode:1973A&A....24..337S.
Lightman, Alan P.; Eardley, Douglas M. (1974). "Black Holes in Binary Systems: Instability of Disk Accretion". The Astrophysical Journal. 187: L1. Bibcode:1974ApJ...187L...1L. doi:10.1086/181377.
Eigenbrod, A.; Courbin, F.; Meylan, G.; Agol, E.; Anguita, T.; Schmidt, R. W.; Wambsganss, J. (2008). "Microlensing variability in the gravitationally lensed quasar QSO 2237+0305=the Einstein Cross. II. Energy profile of the accretion disk". Astronomy & Astrophysics. 490 (3): 933–943. arXiv:0810.0011. Bibcode:2008A&A...490..933E. doi:10.1051/0004-6361:200810729. S2CID14230245.
Shakura, N. I.; Sunyaev, R. A (1973). "Black holes in binary systems. Observational appearance". Astronomy and Astrophysics. 24: 337–355. Bibcode:1973A&A....24..337S.
Eigenbrod, A.; Courbin, F.; Meylan, G.; Agol, E.; Anguita, T.; Schmidt, R. W.; Wambsganss, J. (2008). "Microlensing variability in the gravitationally lensed quasar QSO 2237+0305=the Einstein Cross. II. Energy profile of the accretion disk". Astronomy & Astrophysics. 490 (3): 933–943. arXiv:0810.0011. Bibcode:2008A&A...490..933E. doi:10.1051/0004-6361:200810729. S2CID14230245.