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“The Colour of Stars”. 《Australia Telescope, Outreach and Education》. Commonwealth Scientific and Industrial Research Organisation. 2004년 12월 21일. 2012년 3월 10일에 원본 문서에서 보존된 문서. 2012년 1월 16일에 확인함.
Monet, David G.; Levine, Stephen E.; Canzian, Blaise; Ables, Harold D.; Bird, Alan R.; Dahn, Conard C.; Guetter, Harry H.; Harris, Hugh C.; Henden, Arne A. (February 2003). “The USNO-B Catalog”. 《The Astronomical Journal》 125 (2): 984–993. arXiv:astro-ph/0210694. Bibcode:2003AJ....125..984M. doi:10.1086/345888.
Mittag, M.; Schröder, K.-P.; Hempelmann, A.; González-Pérez, J. N.; Schmitt, J. H. M. M. (2016). “Chromospheric activity and evolutionary age of the Sun and four solar twins”. 《Astronomy & Astrophysics》 591: A89. arXiv:1607.01279. Bibcode:2016A&A...591A..89M. doi:10.1051/0004-6361/201527542.
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Monet, David G.; Levine, Stephen E.; Canzian, Blaise; Ables, Harold D.; Bird, Alan R.; Dahn, Conard C.; Guetter, Harry H.; Harris, Hugh C.; Henden, Arne A. (February 2003). “The USNO-B Catalog”. 《The Astronomical Journal》 125 (2): 984–993. arXiv:astro-ph/0210694. Bibcode:2003AJ....125..984M. doi:10.1086/345888.
Mittag, M.; Schröder, K.-P.; Hempelmann, A.; González-Pérez, J. N.; Schmitt, J. H. M. M. (2016). “Chromospheric activity and evolutionary age of the Sun and four solar twins”. 《Astronomy & Astrophysics》 591: A89. arXiv:1607.01279. Bibcode:2016A&A...591A..89M. doi:10.1051/0004-6361/201527542.
Keenan, Philip C.; McNeil, Raymond C. (1989). “The Perkins Catalog of Revised MK Types for the Cooler Stars”. 《The Astrophysical Journal Supplement Series》 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
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“The Colour of Stars”. 《Australia Telescope, Outreach and Education》. Commonwealth Scientific and Industrial Research Organisation. 2004년 12월 21일. 2012년 3월 10일에 원본 문서에서 보존된 문서. 2012년 1월 16일에 확인함.