Naef, D.; et al. (agosto de 2007). «The HARPS search for southern extra-solar planets. IX. Exoplanets orbiting HD 100777, HD 190647, and HD 221287». Astronomy and Astrophysics. 470 (2): 721-726. Bibcode:2007A&A...470..721N. doi:10.1051/0004-6361:20077361
Bonfanti, A.; Ortolani, S.; Nascimbeni, V. (janeiro de 2016). «Age consistency between exoplanet hosts and field stars». Astronomy & Astrophysics. 585: A5, 14. Bibcode:2016A&A...585A...5B. doi:10.1051/0004-6361/201527297 !CS1 manut: Nomes múltiplos: lista de autores (link)
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Naef, D.; et al. (agosto de 2007). «The HARPS search for southern extra-solar planets. IX. Exoplanets orbiting HD 100777, HD 190647, and HD 221287». Astronomy and Astrophysics. 470 (2): 721-726. Bibcode:2007A&A...470..721N. doi:10.1051/0004-6361:20077361
Bonfanti, A.; Ortolani, S.; Nascimbeni, V. (janeiro de 2016). «Age consistency between exoplanet hosts and field stars». Astronomy & Astrophysics. 585: A5, 14. Bibcode:2016A&A...585A...5B. doi:10.1051/0004-6361/201527297 !CS1 manut: Nomes múltiplos: lista de autores (link)