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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
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Cohen, Martin; 외. (April 1999), “Spectral Irradiance Calibration in the Infrared. X. A Self-Consistent Radiometric All-Sky Network of Absolutely Calibrated Stellar Spectra”, 《The Astronomical Journal》 117 (4): 1864–1889, Bibcode:1999AJ....117.1864C, doi:10.1086/300813
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Massarotti, Alessandro; 외. (January 2008), “Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity”, 《The Astronomical Journal》 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209
McMillan, R. S.; Smith, P. H.; Moore, T. L.; Perry, M. L. (December 1992), “Variation of the radial velocity of Epsilon Cygni A”, 《Publications of the Astronomical Society of the Pacific》 104 (682): 1173–1176, Bibcode:1992PASP..104.1173M, doi:10.1086/133105
Cohen, Martin; 외. (April 1999), “Spectral Irradiance Calibration in the Infrared. X. A Self-Consistent Radiometric All-Sky Network of Absolutely Calibrated Stellar Spectra”, 《The Astronomical Journal》 117 (4): 1864–1889, Bibcode:1999AJ....117.1864C, doi:10.1086/300813
“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