Moles, M.; Marquez, I.; Sulentic, J. W. (1998). „The observational status of Stephan's Quintet”. Astronomy and Astrophysics. 334: 473—481. Bibcode:1998A&A...334..473M. arXiv:astro-ph/9802328.
F. Gastaldello; M. Limousin; G. Foëx; R. P. Muñoz; T. Verdugo; V. Motta; et al. (22. 4. 2014). „Dark matter-baryons separation at the lowest mass scale: the Bullet Group”. Monthly Notices of the Royal Astronomical Society: Letters (објављено јул 2014). 442 (1): L76–L80. Bibcode:2014MNRAS.442L..76G. arXiv:1404.5633. doi:10.1093/mnrasl/slu058.CS1 одржавање: Формат датума (веза)
M. Stephan (april 1877). „Nebulæ (new) discovered and observed at the observatory of Marseilles, 1876 and 1877, M. Stephan”. Monthly Notices of the Royal Astronomical Society. 37 (6): 334. Bibcode:1877MNRAS..37..334S. doi:10.1093/mnras/37.6.334.
Hickson, Paul (april 1982). „Systematic properties of compact groups of galaxies”. Astrophysical Journal, Part 1. 255: 382—391. Bibcode:1982ApJ...255..382H. doi:10.1086/159838.
F. Gastaldello; M. Limousin; G. Foëx; R. P. Muñoz; T. Verdugo; V. Motta; et al. (22. 4. 2014). „Dark matter-baryons separation at the lowest mass scale: the Bullet Group”. Monthly Notices of the Royal Astronomical Society: Letters (објављено јул 2014). 442 (1): L76–L80. Bibcode:2014MNRAS.442L..76G. arXiv:1404.5633. doi:10.1093/mnrasl/slu058.CS1 одржавање: Формат датума (веза)
M. Stephan (april 1877). „Nebulæ (new) discovered and observed at the observatory of Marseilles, 1876 and 1877, M. Stephan”. Monthly Notices of the Royal Astronomical Society. 37 (6): 334. Bibcode:1877MNRAS..37..334S. doi:10.1093/mnras/37.6.334.
Hickson, Paul (april 1982). „Systematic properties of compact groups of galaxies”. Astrophysical Journal, Part 1. 255: 382—391. Bibcode:1982ApJ...255..382H. doi:10.1086/159838.
Moles, M.; Marquez, I.; Sulentic, J. W. (1998). „The observational status of Stephan's Quintet”. Astronomy and Astrophysics. 334: 473—481. Bibcode:1998A&A...334..473M. arXiv:astro-ph/9802328.
F. Gastaldello; M. Limousin; G. Foëx; R. P. Muñoz; T. Verdugo; V. Motta; et al. (22. 4. 2014). „Dark matter-baryons separation at the lowest mass scale: the Bullet Group”. Monthly Notices of the Royal Astronomical Society: Letters (објављено јул 2014). 442 (1): L76–L80. Bibcode:2014MNRAS.442L..76G. arXiv:1404.5633. doi:10.1093/mnrasl/slu058.CS1 одржавање: Формат датума (веза)