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J. L. Tonry; A. Dressler; J. P. Blakeslee; E. A. Ajhar; in sod. (2001). »The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances«. Astrophysical Journal. 546 (2): 681–693. arXiv:astro-ph/0011223. Bibcode:2001ApJ...546..681T. doi:10.1086/318301.
Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (Oktober 1997). »A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies«. Astrophysical Journal Supplement. Zv. 112, št. 2. str. 315–390. arXiv:astro-ph/9704107. Bibcode:1997ApJS..112..315H. doi:10.1086/313041.
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Shih, Hsin-Yi; Méndez, Roberto H. (2010). »Possible Stellar Streams in the Edge-on Spiral NGC 891 Discovered from Kinematics of Planetary Nebulae«. The Astrophysical Journal Letters. Zv. 725, št. 1. str. L97–L100. Bibcode:2010ApJ...725L..97S. doi:10.1088/2041-8205/725/1/L97.
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J. L. Tonry; A. Dressler; J. P. Blakeslee; E. A. Ajhar; in sod. (2001). »The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances«. Astrophysical Journal. 546 (2): 681–693. arXiv:astro-ph/0011223. Bibcode:2001ApJ...546..681T. doi:10.1086/318301.
Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (Oktober 1997). »A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies«. Astrophysical Journal Supplement. Zv. 112, št. 2. str. 315–390. arXiv:astro-ph/9704107. Bibcode:1997ApJS..112..315H. doi:10.1086/313041.
Karachentsev, Igor D.; Karachentseva, Valentina E.; Huchtmeier, Walter K.; Makarov, Dmitry I. (2003). »A Catalog of Neighboring Galaxies«. The Astronomical Journal. Zv. 127, št. 4. str. 2031–2068. Bibcode:2004AJ....127.2031K. doi:10.1086/382905.
Shih, Hsin-Yi; Méndez, Roberto H. (2010). »Possible Stellar Streams in the Edge-on Spiral NGC 891 Discovered from Kinematics of Planetary Nebulae«. The Astrophysical Journal Letters. Zv. 725, št. 1. str. L97–L100. Bibcode:2010ApJ...725L..97S. doi:10.1088/2041-8205/725/1/L97.
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