Djorgovski, S. G.; Courbin, F.; Meylan, G.; Sluse, D.; Thompson, D.; Mahabal, A.; Glikman, E. (2007). “Discovery of a Probable Physical Triple Quasar”. 《The Astrophysical Journal》 662 (1): L1–L5. arXiv:astro-ph/0701155. Bibcode:2007ApJ...662L...1D. doi:10.1086/519162. CS1 관리 - 여러 이름 (링크)
S. Chandrasekhar (1964). “The Dynamic Instability of Gaseous Masses Approaching the Schwarzschild Limit in General Relativity”. 《Astrophysical Journal》 140 (2): 417–433. Bibcode:1964ApJ...140..417C. doi:10.1086/147938.
J. Greenstein and M. Schmidt (1964). “The Quasi-Stellar Radio Sources 3C 48 and 3C ”. 《Astrophysical Journal》 140 (1): 1–34. Bibcode:1964ApJ...140....1G. doi:10.1086/147889.
Hennawi, Joseph F. (2010). “Binary Quasars at High redshift. I. 24 New Quasar Pairs at z∼ 3-4”. 《The Astrophysical Journal》 719 (2): 1672–1692. doi:10.1088/0004-637X/719/2/1672. ISSN0004-637X.
Djorgovski, S. G.; Courbin, F.; Meylan, G.; Sluse, D.; Thompson, D.; Mahabal, A.; Glikman, E. (2007). “Discovery of a Probable Physical Triple Quasar”. 《The Astrophysical Journal》 662 (1): L1–L5. arXiv:astro-ph/0701155. Bibcode:2007ApJ...662L...1D. doi:10.1086/519162. CS1 관리 - 여러 이름 (링크)
Farina, E. P.; Montuori, C.; Decarli, R.; Fumagalli, M. (2013). “Caught in the act: discovery of a physical quasar triplet”. 《Monthly Notices of the Royal Astronomical Society》 431 (2): 1019–1025. doi:10.1093/mnras/stt209. ISSN0035-8711.
S. Chandrasekhar (1964). “The Dynamic Instability of Gaseous Masses Approaching the Schwarzschild Limit in General Relativity”. 《Astrophysical Journal》 140 (2): 417–433. Bibcode:1964ApJ...140..417C. doi:10.1086/147938.
J. Greenstein and M. Schmidt (1964). “The Quasi-Stellar Radio Sources 3C 48 and 3C ”. 《Astrophysical Journal》 140 (1): 1–34. Bibcode:1964ApJ...140....1G. doi:10.1086/147889.
Djorgovski, S. G.; Courbin, F.; Meylan, G.; Sluse, D.; Thompson, D.; Mahabal, A.; Glikman, E. (2007). “Discovery of a Probable Physical Triple Quasar”. 《The Astrophysical Journal》 662 (1): L1–L5. arXiv:astro-ph/0701155. Bibcode:2007ApJ...662L...1D. doi:10.1086/519162. CS1 관리 - 여러 이름 (링크)
Hennawi, Joseph F. (2010). “Binary Quasars at High redshift. I. 24 New Quasar Pairs at z∼ 3-4”. 《The Astrophysical Journal》 719 (2): 1672–1692. doi:10.1088/0004-637X/719/2/1672. ISSN0004-637X.
Farina, E. P.; Montuori, C.; Decarli, R.; Fumagalli, M. (2013). “Caught in the act: discovery of a physical quasar triplet”. 《Monthly Notices of the Royal Astronomical Society》 431 (2): 1019–1025. doi:10.1093/mnras/stt209. ISSN0035-8711.