Tuomi, M.; et al. (janeiro de 2013). «Habitable-zone super-Earth candidate in a six-planet system around the K2.5V star HD 40307». Astronomy & Astrophysics. 549. pp. A48, 23 pp. Bibcode:2013A&A...549A..48T. doi:10.1051/0004-6361/201220268 !CS1 manut: Uso explícito de et al. (link)
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Tuomi, M.; et al. (janeiro de 2013). «Habitable-zone super-Earth candidate in a six-planet system around the K2.5V star HD 40307». Astronomy & Astrophysics. 549. pp. A48, 23 pp. Bibcode:2013A&A...549A..48T. doi:10.1051/0004-6361/201220268 !CS1 manut: Uso explícito de et al. (link)