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Barth, Aaron J.; Strigari, Louis E.; Bentz, Misty C.; Greene, Jenny E.; Ho, Luis C. (January 2009), "Dynamical Constraints on the Masses of the Nuclear Star Cluster and Black Hole in the Late-Type Spiral Galaxy NGC 3621", The Astronomical Journal, 690 (1): 1031–1044, arXiv:0809.1066, Bibcode:2009ApJ...690.1031B, doi:10.1088/0004-637X/690/1/1031, S2CID12574940.
Tully, R. Brent; Shaya, Edward J.; Karachentsev, Igor D.; Courtois, Hélène M.; Kocevski, Dale D.; Rizzi, Luca; Peel, Alan (January 1995), "Recalibration of the H–0.5 magnitudes of spiral galaxies", Astrophysical Journal Supplement Series, 96 (1): 123–157, arXiv:astro-ph/9405047, Bibcode:1995ApJS...96..123T, doi:10.1086/192115, S2CID15737426.
Barth, Aaron J.; Strigari, Louis E.; Bentz, Misty C.; Greene, Jenny E.; Ho, Luis C. (January 2009), "Dynamical Constraints on the Masses of the Nuclear Star Cluster and Black Hole in the Late-Type Spiral Galaxy NGC 3621", The Astronomical Journal, 690 (1): 1031–1044, arXiv:0809.1066, Bibcode:2009ApJ...690.1031B, doi:10.1088/0004-637X/690/1/1031, S2CID12574940.
Tully, R. Brent; Shaya, Edward J.; Karachentsev, Igor D.; Courtois, Hélène M.; Kocevski, Dale D.; Rizzi, Luca; Peel, Alan (January 1995), "Recalibration of the H–0.5 magnitudes of spiral galaxies", Astrophysical Journal Supplement Series, 96 (1): 123–157, arXiv:astro-ph/9405047, Bibcode:1995ApJS...96..123T, doi:10.1086/192115, S2CID15737426.
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Barth, Aaron J.; Strigari, Louis E.; Bentz, Misty C.; Greene, Jenny E.; Ho, Luis C. (January 2009), "Dynamical Constraints on the Masses of the Nuclear Star Cluster and Black Hole in the Late-Type Spiral Galaxy NGC 3621", The Astronomical Journal, 690 (1): 1031–1044, arXiv:0809.1066, Bibcode:2009ApJ...690.1031B, doi:10.1088/0004-637X/690/1/1031, S2CID12574940.
Tully, R. Brent; Shaya, Edward J.; Karachentsev, Igor D.; Courtois, Hélène M.; Kocevski, Dale D.; Rizzi, Luca; Peel, Alan (January 1995), "Recalibration of the H–0.5 magnitudes of spiral galaxies", Astrophysical Journal Supplement Series, 96 (1): 123–157, arXiv:astro-ph/9405047, Bibcode:1995ApJS...96..123T, doi:10.1086/192115, S2CID15737426.
Barth, Aaron J.; Strigari, Louis E.; Bentz, Misty C.; Greene, Jenny E.; Ho, Luis C. (January 2009), "Dynamical Constraints on the Masses of the Nuclear Star Cluster and Black Hole in the Late-Type Spiral Galaxy NGC 3621", The Astronomical Journal, 690 (1): 1031–1044, arXiv:0809.1066, Bibcode:2009ApJ...690.1031B, doi:10.1088/0004-637X/690/1/1031, S2CID12574940.