Ann, H. B.; Seo, Mira; Ha, D. K. (2015), ”A Catalog of Visually Classified Galaxies in the Local (z ∼ 0.01) Universe”, The Astrophysical Journal Supplement Series 217 (2): 27–49, doi:10.1088/0067-0049/217/2/27, Bibcode: 2015ApJS..217...27A.
Thornley, Michele D. (September 1996), ”Uncovering Spiral Structure in Flocculent Galaxies”, Astrophysical Journal Letters 469: L45, doi:10.1086/310250, Bibcode: 1996ApJ...469L..45T.
Graham, Alister W. (November 2008), ”Populating the Galaxy Velocity Dispersion - Supermassive Black Hole Mass Diagram: A Catalogue of (Mbh, σ) Values”, Publications of the Astronomical Society of Australia 25 (4): 167–175, doi:10.1071/AS08013, Bibcode: 2008PASA...25..167G.
Battaglia, G.; Fraternali, F.; Oosterloo, T.; Sancisi, R. (February 2006), ”ion{H}{i} study of the warped spiral galaxy NGC 5055: a disk/dark matter halo offset?”, Astronomy and Astrophysics 447 (1): 49–62, doi:10.1051/0004-6361:20053210, Bibcode: 2006A&A...447...49B.
McQuinn, Kristen. B. W.; Skillman, Evan D.; Dolphin, Andrew E.; Berg, Danielle; Kennicutt, Robert (August 2017), ”Accurate Distances to Important Spiral Galaxies: M63, M74, NGC 1291, NGC 4559, NGC 4625, and NGC 5398”, The Astronomical Journal 154 (2): 13, doi:10.3847/1538-3881/aa7aad, 51, Bibcode: 2017AJ....154...51M.
Tikhonov, N. A.; Galazutdinova, O. A.; Tikhonov, E. N. (September 2009), ”Stellar content of the interacting galaxies of the M51 system”, Astronomy Letters 35 (9): 599–608, doi:10.1134/S1063773709090035, Bibcode: 2009AstL...35..599T.
Deming, Drake; Rust, Bert W.; Olson, Edward C. (June 1973), ”The Light Curve of Supernova 1971 I”, Publications of the Astronomical Society of the Pacific 85 (505): 321, doi:10.1086/129462, Bibcode: 1973PASP...85..321D
Ann, H. B.; Seo, Mira; Ha, D. K. (2015), ”A Catalog of Visually Classified Galaxies in the Local (z ∼ 0.01) Universe”, The Astrophysical Journal Supplement Series 217 (2): 27–49, doi:10.1088/0067-0049/217/2/27, Bibcode: 2015ApJS..217...27A.
Thornley, Michele D. (September 1996), ”Uncovering Spiral Structure in Flocculent Galaxies”, Astrophysical Journal Letters 469: L45, doi:10.1086/310250, Bibcode: 1996ApJ...469L..45T.
Graham, Alister W. (November 2008), ”Populating the Galaxy Velocity Dispersion - Supermassive Black Hole Mass Diagram: A Catalogue of (Mbh, σ) Values”, Publications of the Astronomical Society of Australia 25 (4): 167–175, doi:10.1071/AS08013, Bibcode: 2008PASA...25..167G.
Battaglia, G.; Fraternali, F.; Oosterloo, T.; Sancisi, R. (February 2006), ”ion{H}{i} study of the warped spiral galaxy NGC 5055: a disk/dark matter halo offset?”, Astronomy and Astrophysics 447 (1): 49–62, doi:10.1051/0004-6361:20053210, Bibcode: 2006A&A...447...49B.
McQuinn, Kristen. B. W.; Skillman, Evan D.; Dolphin, Andrew E.; Berg, Danielle; Kennicutt, Robert (August 2017), ”Accurate Distances to Important Spiral Galaxies: M63, M74, NGC 1291, NGC 4559, NGC 4625, and NGC 5398”, The Astronomical Journal 154 (2): 13, doi:10.3847/1538-3881/aa7aad, 51, Bibcode: 2017AJ....154...51M.
Tikhonov, N. A.; Galazutdinova, O. A.; Tikhonov, E. N. (September 2009), ”Stellar content of the interacting galaxies of the M51 system”, Astronomy Letters 35 (9): 599–608, doi:10.1134/S1063773709090035, Bibcode: 2009AstL...35..599T.
Barbon, R.; Ciatti, F.; Rosino, L. (1973), ”Observations of five supernovae 1970-71”, Memorie della Società Astronomia Italiana 44: 65, Bibcode: 1973MmSAI..44...65B.
Deming, Drake; Rust, Bert W.; Olson, Edward C. (June 1973), ”The Light Curve of Supernova 1971 I”, Publications of the Astronomical Society of the Pacific 85 (505): 321, doi:10.1086/129462, Bibcode: 1973PASP...85..321D