Anthony-Twarog, Barbara J.; Tanner, Delora; Cracraft, Misty; Twarog, Bruce A. (January 2006). "vby C a Hβ CCD Photometry of Clusters. VI. The Metal-deficient Open Cluster NGC 2420". The Astronomical Journal. 131 (1): 461–472. arXiv:astro-ph/0510047. Bibcode:2006AJ....131..461A. doi:10.1086/498304.
Pancino, E.; Carrera, R.; Rossetti, E.; Gallart, C. (February 2010). "Chemical abundance analysis of the open clusters Cr 110, NGC 2099 (M 37), NGC 2420, NGC 7789, and M 67 (NGC 2682)". Astronomy and Astrophysics. 511: A56. arXiv:0910.0723. Bibcode:2010A&A...511A..56P. doi:10.1051/0004-6361/200912965.
Semenova, Ekaterina; Bergemann, Maria; Deal, Morgan; Serenelli, Aldo; Hansen, Camilla Juul; Gallagher, Andrew J.; Bayo, Amelia; Bensby, Thomas; Bragaglia, Angela; Carraro, Giovanni; Morbidelli, Lorenzo; Pancino, Elena; Smiljanic, Rodolfo (November 2020). "The Gaia -ESO survey: 3D NLTE abundances in the open cluster NGC 2420 suggest atomic diffusion and turbulent mixing are at the origin of chemical abundance variations". Astronomy & Astrophysics. 643: A164. arXiv:2007.09153. Bibcode:2020A&A...643A.164S. doi:10.1051/0004-6361/202038833.
Carrera, R.; Martínez-Vázquez, C. E. (December 2013). "Searching for chemical inhomogeneities in open clusters: Analysis of the CN and CH molecular band strengths in NGC 2158, NGC 2420, NGC 2682, NGC 7789, and Berkeley 29⋆". Astronomy & Astrophysics. 560: A5. arXiv:1308.4548. Bibcode:2013A&A...560A...5C. doi:10.1051/0004-6361/201322048.
West, Frederick R. (September 1967). "Photographic Photometry of the Galactic Cluster NGC 2420". The Astrophysical Journal Supplement Series. 14: 384. Bibcode:1967ApJS...14..384W. doi:10.1086/190160.
Smith, Verne V.; Suntzeff, Nicholas B. (February 1987). "Velocities and abundances of giant stars in the old open cluster NGC 2420". The Astronomical Journal. 93: 359. Bibcode:1987AJ.....93..359S. doi:10.1086/114320.
Pilachowski, C. A.; Wallerstein, G.; Canterna, R. (January 1980). "The chemical compositions of stars in the globular cluster 47 Tucanae and the old disk cluster NGC 2420". The Astrophysical Journal. 235: L21. Bibcode:1980ApJ...235L..21P. doi:10.1086/183150.
Anthony-Twarog, Barbara J.; Tanner, Delora; Cracraft, Misty; Twarog, Bruce A. (January 2006). "vby C a Hβ CCD Photometry of Clusters. VI. The Metal-deficient Open Cluster NGC 2420". The Astronomical Journal. 131 (1): 461–472. arXiv:astro-ph/0510047. Bibcode:2006AJ....131..461A. doi:10.1086/498304.
Pancino, E.; Carrera, R.; Rossetti, E.; Gallart, C. (February 2010). "Chemical abundance analysis of the open clusters Cr 110, NGC 2099 (M 37), NGC 2420, NGC 7789, and M 67 (NGC 2682)". Astronomy and Astrophysics. 511: A56. arXiv:0910.0723. Bibcode:2010A&A...511A..56P. doi:10.1051/0004-6361/200912965.
Semenova, Ekaterina; Bergemann, Maria; Deal, Morgan; Serenelli, Aldo; Hansen, Camilla Juul; Gallagher, Andrew J.; Bayo, Amelia; Bensby, Thomas; Bragaglia, Angela; Carraro, Giovanni; Morbidelli, Lorenzo; Pancino, Elena; Smiljanic, Rodolfo (November 2020). "The Gaia -ESO survey: 3D NLTE abundances in the open cluster NGC 2420 suggest atomic diffusion and turbulent mixing are at the origin of chemical abundance variations". Astronomy & Astrophysics. 643: A164. arXiv:2007.09153. Bibcode:2020A&A...643A.164S. doi:10.1051/0004-6361/202038833.
Carrera, R.; Martínez-Vázquez, C. E. (December 2013). "Searching for chemical inhomogeneities in open clusters: Analysis of the CN and CH molecular band strengths in NGC 2158, NGC 2420, NGC 2682, NGC 7789, and Berkeley 29⋆". Astronomy & Astrophysics. 560: A5. arXiv:1308.4548. Bibcode:2013A&A...560A...5C. doi:10.1051/0004-6361/201322048.
West, Frederick R. (September 1967). "Photographic Photometry of the Galactic Cluster NGC 2420". The Astrophysical Journal Supplement Series. 14: 384. Bibcode:1967ApJS...14..384W. doi:10.1086/190160.
Smith, Verne V.; Suntzeff, Nicholas B. (February 1987). "Velocities and abundances of giant stars in the old open cluster NGC 2420". The Astronomical Journal. 93: 359. Bibcode:1987AJ.....93..359S. doi:10.1086/114320.
Pilachowski, C. A.; Wallerstein, G.; Canterna, R. (January 1980). "The chemical compositions of stars in the globular cluster 47 Tucanae and the old disk cluster NGC 2420". The Astrophysical Journal. 235: L21. Bibcode:1980ApJ...235L..21P. doi:10.1086/183150.
Anthony-Twarog, Barbara J.; Tanner, Delora; Cracraft, Misty; Twarog, Bruce A. (January 2006). "vby C a Hβ CCD Photometry of Clusters. VI. The Metal-deficient Open Cluster NGC 2420". The Astronomical Journal. 131 (1): 461–472. arXiv:astro-ph/0510047. Bibcode:2006AJ....131..461A. doi:10.1086/498304.
Pancino, E.; Carrera, R.; Rossetti, E.; Gallart, C. (February 2010). "Chemical abundance analysis of the open clusters Cr 110, NGC 2099 (M 37), NGC 2420, NGC 7789, and M 67 (NGC 2682)". Astronomy and Astrophysics. 511: A56. arXiv:0910.0723. Bibcode:2010A&A...511A..56P. doi:10.1051/0004-6361/200912965.
Semenova, Ekaterina; Bergemann, Maria; Deal, Morgan; Serenelli, Aldo; Hansen, Camilla Juul; Gallagher, Andrew J.; Bayo, Amelia; Bensby, Thomas; Bragaglia, Angela; Carraro, Giovanni; Morbidelli, Lorenzo; Pancino, Elena; Smiljanic, Rodolfo (November 2020). "The Gaia -ESO survey: 3D NLTE abundances in the open cluster NGC 2420 suggest atomic diffusion and turbulent mixing are at the origin of chemical abundance variations". Astronomy & Astrophysics. 643: A164. arXiv:2007.09153. Bibcode:2020A&A...643A.164S. doi:10.1051/0004-6361/202038833.
Carrera, R.; Martínez-Vázquez, C. E. (December 2013). "Searching for chemical inhomogeneities in open clusters: Analysis of the CN and CH molecular band strengths in NGC 2158, NGC 2420, NGC 2682, NGC 7789, and Berkeley 29⋆". Astronomy & Astrophysics. 560: A5. arXiv:1308.4548. Bibcode:2013A&A...560A...5C. doi:10.1051/0004-6361/201322048.