Bowditch, LL.D., Nathaniel (2002) [1802]. 〈15: Navigational Astronomy〉(PDF). 《The American Practical Navigator: An Epitome of Navigation》. Bethesda, MD: National Imagery and Mapping Agency. 248쪽. ISBN978-0-939837-54-0. 2016년 11월 30일에 원본 문서(PDF)에서 보존된 문서. 2016년 9월 20일에 확인함.
Gray, R. O.; 외. (July 2006). “Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample”. 《The Astronomical Journal》 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637.
Fitzpatrick, Edward L.; Massa, Derck (November 1999). “Determining the Physical Properties of the B Stars. I. Methodology and First Results”. 《The Astrophysical Journal》 525 (2): 1011–1023. arXiv:astro-ph/9906257. Bibcode:1999ApJ...525.1011F. doi:10.1086/307944.
“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.
Gray, R. O.; 외. (July 2006). “Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample”. 《The Astronomical Journal》 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637.
Richichi, A.; Percheron, I.; Khristoforova, M. (February 2005). “CHARM2: An updated Catalog of High Angular Resolution Measurements”. 《Astronomy and Astrophysics》 431 (2): 773–777. Bibcode:2005A&A...431..773R. doi:10.1051/0004-6361:20042039.
Niemczura, E. (June 2003). “Metallicities of the SPB stars from the IUE ultraviolet spectra”. 《Astronomy and Astrophysics》 404 (2): 689–700. Bibcode:2003A&A...404..689N. doi:10.1051/0004-6361:20030546.. The fractional abundance relative to the Sun is given by:
10−0.13 = 0.74, or 74%.
Fitzpatrick, Edward L.; Massa, Derck (November 1999). “Determining the Physical Properties of the B Stars. I. Methodology and First Results”. 《The Astrophysical Journal》 525 (2): 1011–1023. arXiv:astro-ph/9906257. Bibcode:1999ApJ...525.1011F. doi:10.1086/307944.
Gray, R. O.; 외. (July 2006). “Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample”. 《The Astronomical Journal》 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637.
Malagnini, M. L.; Morossi, C. (November 1990). “Accurate absolute luminosities, effective temperatures, radii, masses and surface gravities for a selected sample of field stars”. 《Astronomy and Astrophysics Supplement Series》 85 (3): 1015–1019. Bibcode:1990A&AS...85.1015M.
Richichi, A.; Percheron, I.; Khristoforova, M. (February 2005). “CHARM2: An updated Catalog of High Angular Resolution Measurements”. 《Astronomy and Astrophysics》 431 (2): 773–777. Bibcode:2005A&A...431..773R. doi:10.1051/0004-6361:20042039.
Niemczura, E. (June 2003). “Metallicities of the SPB stars from the IUE ultraviolet spectra”. 《Astronomy and Astrophysics》 404 (2): 689–700. Bibcode:2003A&A...404..689N. doi:10.1051/0004-6361:20030546.. The fractional abundance relative to the Sun is given by:
10−0.13 = 0.74, or 74%.
Fitzpatrick, Edward L.; Massa, Derck (November 1999). “Determining the Physical Properties of the B Stars. I. Methodology and First Results”. 《The Astrophysical Journal》 525 (2): 1011–1023. arXiv:astro-ph/9906257. Bibcode:1999ApJ...525.1011F. doi:10.1086/307944.
Dachs, J.; 외. (March 1981). “Photoelectric scanner measurements of Balmer emission line profiles for southern Be stars. II - A survey for variations”. 《Astronomy and Astrophysics Supplement Series》 43: 427–453. Bibcode:1981A&AS...43..427D.
Bowditch, LL.D., Nathaniel (2002) [1802]. 〈15: Navigational Astronomy〉(PDF). 《The American Practical Navigator: An Epitome of Navigation》. Bethesda, MD: National Imagery and Mapping Agency. 248쪽. ISBN978-0-939837-54-0. 2016년 11월 30일에 원본 문서(PDF)에서 보존된 문서. 2016년 9월 20일에 확인함.
“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.