Annibali, F.; Aloisi, A.; Mack, J.; Tosi, M. et al. (2008). “Starbursts in the Local Universe: New Hubble Space Telescope Advanced Camera for Surveys Observations of the Irregular Galaxy NGC 4449”. The Astronomical Journal135 (5): 1900–1916. arXiv:0708.0852. Bibcode: 2008AJ....135.1900A. doi:10.1088/0004-6256/135/5/1900.
Reines, Amy E.; Johnson, Kelsey E.; Goss, W. M. (2008). “Emerging Massive Star Clusters Revealed: High-Resolution Imaging of NGC 4449 from the Radio to the Ultraviolet”. The Astronomical Journal135 (6): 2222–2239. arXiv:0804.0005. Bibcode: 2008AJ....135.2222R. doi:10.1088/0004-6256/135/6/2222.
Böker, Torsten; van der Marel, Roeland P.; Mazzuca, Lisa; Rix, Hans-Walter et al. (2001). “A Young Stellar Cluster in the Nucleus of NGC 4449”. The Astronomical Journal121 (3): 1473–1481. arXiv:astro-ph/0010542. Bibcode: 2001AJ....121.1473B. doi:10.1086/319415.
Martínez-Delgado, David; Romanowsky, Aaron J.; Gabany, R. Jay; Annibali, Francesca et al. (2012). “Dwarfs Gobbling Dwarfs: A Stellar Tidal Stream around NGC 4449 and Hierarchical Galaxy Formation on Small Scales”. The Astrophysical Journal Letters748 (2): L24. arXiv:1112.2154. Bibcode: 2012ApJ...748L..24M. doi:10.1088/2041-8205/748/2/L24.
Annibali, F.; Tosi, M.; Aloisi, A.; van der Marel, R. P. et al. (2012). “Cluster 77 in NGC 4449: The Nucleus of a Satellite Galaxy Being Transformed into a Globular Cluster?”. The Astrophysical Journal Letters745 (1): L1. arXiv:1111.5861. Bibcode: 2012ApJ...745L...1A. doi:10.1088/2041-8205/745/1/L1.
Karachentsev, Igor D.; Karachentseva, Valentina E.; Huchtmeier, Walter K.; Makarov, Dmitry I. (2003). “A Catalog of Neighboring Galaxies”. The Astronomical Journal127 (4): 2031–2068. Bibcode: 2004AJ....127.2031K. doi:10.1086/382905.
Annibali, F.; Aloisi, A.; Mack, J.; Tosi, M. et al. (2008). “Starbursts in the Local Universe: New Hubble Space Telescope Advanced Camera for Surveys Observations of the Irregular Galaxy NGC 4449”. The Astronomical Journal135 (5): 1900–1916. arXiv:0708.0852. Bibcode: 2008AJ....135.1900A. doi:10.1088/0004-6256/135/5/1900.
Reines, Amy E.; Johnson, Kelsey E.; Goss, W. M. (2008). “Emerging Massive Star Clusters Revealed: High-Resolution Imaging of NGC 4449 from the Radio to the Ultraviolet”. The Astronomical Journal135 (6): 2222–2239. arXiv:0804.0005. Bibcode: 2008AJ....135.2222R. doi:10.1088/0004-6256/135/6/2222.
Böker, Torsten; van der Marel, Roeland P.; Mazzuca, Lisa; Rix, Hans-Walter et al. (2001). “A Young Stellar Cluster in the Nucleus of NGC 4449”. The Astronomical Journal121 (3): 1473–1481. arXiv:astro-ph/0010542. Bibcode: 2001AJ....121.1473B. doi:10.1086/319415.
Martínez-Delgado, David; Romanowsky, Aaron J.; Gabany, R. Jay; Annibali, Francesca et al. (2012). “Dwarfs Gobbling Dwarfs: A Stellar Tidal Stream around NGC 4449 and Hierarchical Galaxy Formation on Small Scales”. The Astrophysical Journal Letters748 (2): L24. arXiv:1112.2154. Bibcode: 2012ApJ...748L..24M. doi:10.1088/2041-8205/748/2/L24.
Annibali, F.; Tosi, M.; Aloisi, A.; van der Marel, R. P. et al. (2012). “Cluster 77 in NGC 4449: The Nucleus of a Satellite Galaxy Being Transformed into a Globular Cluster?”. The Astrophysical Journal Letters745 (1): L1. arXiv:1111.5861. Bibcode: 2012ApJ...745L...1A. doi:10.1088/2041-8205/745/1/L1.
Karachentsev, Igor D.; Karachentseva, Valentina E.; Huchtmeier, Walter K.; Makarov, Dmitry I. (2003). “A Catalog of Neighboring Galaxies”. The Astronomical Journal127 (4): 2031–2068. Bibcode: 2004AJ....127.2031K. doi:10.1086/382905.
Annibali, F.; Aloisi, A.; Mack, J.; Tosi, M. et al. (2008). “Starbursts in the Local Universe: New Hubble Space Telescope Advanced Camera for Surveys Observations of the Irregular Galaxy NGC 4449”. The Astronomical Journal135 (5): 1900–1916. arXiv:0708.0852. Bibcode: 2008AJ....135.1900A. doi:10.1088/0004-6256/135/5/1900.
Reines, Amy E.; Johnson, Kelsey E.; Goss, W. M. (2008). “Emerging Massive Star Clusters Revealed: High-Resolution Imaging of NGC 4449 from the Radio to the Ultraviolet”. The Astronomical Journal135 (6): 2222–2239. arXiv:0804.0005. Bibcode: 2008AJ....135.2222R. doi:10.1088/0004-6256/135/6/2222.
Böker, Torsten; van der Marel, Roeland P.; Mazzuca, Lisa; Rix, Hans-Walter et al. (2001). “A Young Stellar Cluster in the Nucleus of NGC 4449”. The Astronomical Journal121 (3): 1473–1481. arXiv:astro-ph/0010542. Bibcode: 2001AJ....121.1473B. doi:10.1086/319415.
Bajaja, E.; Huchtmeier, W. K.; Klein, U. (1994). “The extended HI halo in NGC 4449”. Astronomy and Astrophysics285: 385–388. Bibcode: 1994A&A...285..385B.
Martínez-Delgado, David; Romanowsky, Aaron J.; Gabany, R. Jay; Annibali, Francesca et al. (2012). “Dwarfs Gobbling Dwarfs: A Stellar Tidal Stream around NGC 4449 and Hierarchical Galaxy Formation on Small Scales”. The Astrophysical Journal Letters748 (2): L24. arXiv:1112.2154. Bibcode: 2012ApJ...748L..24M. doi:10.1088/2041-8205/748/2/L24.
Annibali, F.; Tosi, M.; Aloisi, A.; van der Marel, R. P. et al. (2012). “Cluster 77 in NGC 4449: The Nucleus of a Satellite Galaxy Being Transformed into a Globular Cluster?”. The Astrophysical Journal Letters745 (1): L1. arXiv:1111.5861. Bibcode: 2012ApJ...745L...1A. doi:10.1088/2041-8205/745/1/L1.