Crook, Aidan C.؛ Huchra, John P.؛ Martimbeau, Nathalie؛ Masters, Karen L.؛ Jarrett, Tom؛ Macri, Lucas M. (2007). "Groups of Galaxies in the Two Micron All Sky Redshift Survey". The Astrophysical Journal. ج. 655 ع. 2: 790–813. arXiv:astro-ph/0610732. Bibcode:2007ApJ...655..790C. DOI:10.1086/510201.
Crook, Aidan C.؛ Huchra, John P.؛ Martimbeau, Nathalie؛ Masters, Karen L.؛ Jarrett, Tom؛ Macri, Lucas M. (2007). "Groups of Galaxies in the Two Micron All Sky Redshift Survey". The Astrophysical Journal. ج. 655 ع. 2: 790–813. arXiv:astro-ph/0610732. Bibcode:2007ApJ...655..790C. DOI:10.1086/510201.
Crook, Aidan C.؛ Huchra, John P.؛ Martimbeau, Nathalie؛ Masters, Karen L.؛ Jarrett, Tom؛ Macri, Lucas M. (2007). "Groups of Galaxies in the Two Micron All Sky Redshift Survey". The Astrophysical Journal. ج. 655 ع. 2: 790–813. arXiv:astro-ph/0610732. Bibcode:2007ApJ...655..790C. DOI:10.1086/510201.
u-strasbg.fr
simbad.u-strasbg.fr
"NGC 159". SIMBAD (بالإنجليزية). Centre de Données astronomiques de Strasbourg. Retrieved 2017-04-11.