Massey, Philip; Bresolin, Fabio; Kudritzki, Rolf P; Puls, Joachim; Pauldrach, A. W. A (2004). "The Physical Properties and Effective Temperature Scale of O-Type Stars as a Function of Metallicity. I. A Sample of 20 Stars in the Magellanic Clouds". The Astrophysical Journal. 608 (2): 1001–1027. arXiv:astro-ph/0402633. Bibcode:2004ApJ...608.1001M. doi:10.1086/420766. S2CID119373878.
Johnson, H. L; Morgan, W. W (1953). "Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes spectral atlas". Astrophysical Journal. 117: 313. Bibcode:1953ApJ...117..313J. doi:10.1086/145697.
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Massey, Philip; Bresolin, Fabio; Kudritzki, Rolf P; Puls, Joachim; Pauldrach, A. W. A (2004). "The Physical Properties and Effective Temperature Scale of O-Type Stars as a Function of Metallicity. I. A Sample of 20 Stars in the Magellanic Clouds". The Astrophysical Journal. 608 (2): 1001–1027. arXiv:astro-ph/0402633. Bibcode:2004ApJ...608.1001M. doi:10.1086/420766. S2CID119373878.
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Table 5, William D. Vacca; Catharine D. Garmany & J. Michael Shull (April 1996). "The Lyman-Continuum Fluxes and Stellar Parameters of O and Early B-Type Stars". Astrophysical Journal. 460: 914–931. Bibcode:1996ApJ...460..914V. doi:10.1086/177020. hdl:2060/19970023476.
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Johnson, H. L; Morgan, W. W (1953). "Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes spectral atlas". Astrophysical Journal. 117: 313. Bibcode:1953ApJ...117..313J. doi:10.1086/145697.
Morgan, W. W; Abt, Helmut A; Tapscott, J. W (1978). "Revised MK Spectral Atlas for stars earlier than the sun". Williams Bay: Yerkes Observatory. Bibcode:1978rmsa.book.....M.
Table 5, William D. Vacca; Catharine D. Garmany & J. Michael Shull (April 1996). "The Lyman-Continuum Fluxes and Stellar Parameters of O and Early B-Type Stars". Astrophysical Journal. 460: 914–931. Bibcode:1996ApJ...460..914V. doi:10.1086/177020. hdl:2060/19970023476.
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Massey, Philip; Bresolin, Fabio; Kudritzki, Rolf P; Puls, Joachim; Pauldrach, A. W. A (2004). "The Physical Properties and Effective Temperature Scale of O-Type Stars as a Function of Metallicity. I. A Sample of 20 Stars in the Magellanic Clouds". The Astrophysical Journal. 608 (2): 1001–1027. arXiv:astro-ph/0402633. Bibcode:2004ApJ...608.1001M. doi:10.1086/420766. S2CID119373878.
Massey, Philip; Bresolin, Fabio; Kudritzki, Rolf P; Puls, Joachim; Pauldrach, A. W. A (2004). "The Physical Properties and Effective Temperature Scale of O-Type Stars as a Function of Metallicity. I. A Sample of 20 Stars in the Magellanic Clouds". The Astrophysical Journal. 608 (2): 1001–1027. arXiv:astro-ph/0402633. Bibcode:2004ApJ...608.1001M. doi:10.1086/420766. S2CID119373878.