Jensen, Joseph B.؛ Tonry, John L.؛ Barris, Brian J.؛ Thompson, Rodger I.؛ وآخرون (فبراير 2003). "Measuring Distances and Probing the Unresolved Stellar Populations of Galaxies Using Infrared Surface Brightness Fluctuations". Astrophysical Journal. ج. 583 ع. 2: 712–726. arXiv:astro-ph/0210129. Bibcode:2003ApJ...583..712J. DOI:10.1086/345430.
del Río, M. S.؛ Brinks, E.؛ Cepa, J. (2004). "High-Resolution H I Observations of the Galaxy NGC 404: A Dwarf S0 with Abundant Interstellar Gas". The Astronomical Journal. ج. 128 ع. 1: 89–102. arXiv:astro-ph/0403467. Bibcode:2004AJ....128...89D. DOI:10.1086/421358.
Thilker, David A.؛ Bianchi, Luciana؛ Schiminovich, David؛ Gil de Paz, Armando؛ وآخرون (2010). "NGC 404: A Rejuvenated Lenticular Galaxy on a Merger-induced, Blueward Excursion Into the Green Valley". The Astrophysical Journal Letters. ج. 714 ع. 1: L171–L175. arXiv:1003.4985. Bibcode:2010ApJ...714L.171T. DOI:10.1088/2041-8205/714/1/L171.
Seth, Anil C.؛ Cappellari, Michele؛ Neumayer, Nadine؛ Caldwell, Nelson؛ وآخرون (2010). "The NGC 404 Nucleus: Star Cluster and Possible Intermediate-mass Black Hole". The Astrophysical Journal. ج. 714 ع. 1: 713–731. arXiv:1003.0680. Bibcode:2010ApJ...714..713S. DOI:10.1088/0004-637X/714/1/713.
Karachentsev, I. D.؛ Kashibadze, O. G. (2006). "Masses of the local group and of the M81 group estimated from distortions in the local velocity field". Astrophysics. ج. 49 ع. 1: 3–18. Bibcode:2006Ap.....49....3K. DOI:10.1007/s10511-006-0002-6.
Karachentsev, Igor D.؛ Karachentseva, Valentina E.؛ Huchtmeier, Walter K.؛ Makarov, Dmitry I. (2003). "A Catalog of Neighboring Galaxies". The Astronomical Journal. ج. 127 ع. 4: 2031–2068. Bibcode:2004AJ....127.2031K. DOI:10.1086/382905.
del Río, M. S.؛ Brinks, E.؛ Cepa, J. (2004). "High-Resolution H I Observations of the Galaxy NGC 404: A Dwarf S0 with Abundant Interstellar Gas". The Astronomical Journal. ج. 128 ع. 1: 89–102. arXiv:astro-ph/0403467. Bibcode:2004AJ....128...89D. DOI:10.1086/421358.
Thilker, David A.؛ Bianchi, Luciana؛ Schiminovich, David؛ Gil de Paz, Armando؛ وآخرون (2010). "NGC 404: A Rejuvenated Lenticular Galaxy on a Merger-induced, Blueward Excursion Into the Green Valley". The Astrophysical Journal Letters. ج. 714 ع. 1: L171–L175. arXiv:1003.4985. Bibcode:2010ApJ...714L.171T. DOI:10.1088/2041-8205/714/1/L171.
Seth, Anil C.؛ Cappellari, Michele؛ Neumayer, Nadine؛ Caldwell, Nelson؛ وآخرون (2010). "The NGC 404 Nucleus: Star Cluster and Possible Intermediate-mass Black Hole". The Astrophysical Journal. ج. 714 ع. 1: 713–731. arXiv:1003.0680. Bibcode:2010ApJ...714..713S. DOI:10.1088/0004-637X/714/1/713.
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Jensen, Joseph B.؛ Tonry, John L.؛ Barris, Brian J.؛ Thompson, Rodger I.؛ وآخرون (فبراير 2003). "Measuring Distances and Probing the Unresolved Stellar Populations of Galaxies Using Infrared Surface Brightness Fluctuations". Astrophysical Journal. ج. 583 ع. 2: 712–726. arXiv:astro-ph/0210129. Bibcode:2003ApJ...583..712J. DOI:10.1086/345430.
Karachentsev, I. D.؛ Kashibadze, O. G. (2006). "Masses of the local group and of the M81 group estimated from distortions in the local velocity field". Astrophysics. ج. 49 ع. 1: 3–18. Bibcode:2006Ap.....49....3K. DOI:10.1007/s10511-006-0002-6.
Materne, J. (أبريل 1979). "The structure of nearby groups of galaxies - Quantitative membership probabilities". Astronomy and Astrophysics. ج. 74 ع. 2: 235–243. Bibcode:1979A&A....74..235M.
Karachentsev, Igor D.؛ Karachentseva, Valentina E.؛ Huchtmeier, Walter K.؛ Makarov, Dmitry I. (2003). "A Catalog of Neighboring Galaxies". The Astronomical Journal. ج. 127 ع. 4: 2031–2068. Bibcode:2004AJ....127.2031K. DOI:10.1086/382905.
del Río, M. S.؛ Brinks, E.؛ Cepa, J. (2004). "High-Resolution H I Observations of the Galaxy NGC 404: A Dwarf S0 with Abundant Interstellar Gas". The Astronomical Journal. ج. 128 ع. 1: 89–102. arXiv:astro-ph/0403467. Bibcode:2004AJ....128...89D. DOI:10.1086/421358.
Thilker, David A.؛ Bianchi, Luciana؛ Schiminovich, David؛ Gil de Paz, Armando؛ وآخرون (2010). "NGC 404: A Rejuvenated Lenticular Galaxy on a Merger-induced, Blueward Excursion Into the Green Valley". The Astrophysical Journal Letters. ج. 714 ع. 1: L171–L175. arXiv:1003.4985. Bibcode:2010ApJ...714L.171T. DOI:10.1088/2041-8205/714/1/L171.
Seth, Anil C.؛ Cappellari, Michele؛ Neumayer, Nadine؛ Caldwell, Nelson؛ وآخرون (2010). "The NGC 404 Nucleus: Star Cluster and Possible Intermediate-mass Black Hole". The Astrophysical Journal. ج. 714 ع. 1: 713–731. arXiv:1003.0680. Bibcode:2010ApJ...714..713S. DOI:10.1088/0004-637X/714/1/713.