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Maíz Apellániz, J.; Alfaro, E. J.; Sota, A. (2008). “Accurate distances to nearby massive stars with the new reduction of the Hipparcos raw data”. 0804: 2553. arXiv:0804.2553. Bibcode:2008arXiv0804.2553M. Chú thích journal cần |journal= (trợ giúp)
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Walborn, Nolan R.; Howarth, Ian D.; Evans, Christopher J.; Crowther, Paul A.; Moffat, Anthony F. J.; St-Louis, Nicole; Farina, Cecilia; Bosch, Guillermo L.; Morrell, Nidia I. (2010). “The Onfp Class in the Magellanic Clouds”. The Astronomical Journal. 139 (3): 1283. arXiv:1001.4032. Bibcode:2010AJ....139.1283W. doi:10.1088/0004-6256/139/3/1283.
Eversberg, T.; Lepine, S.; Moffat, A. F. J. (1998). “Outmoving Clumps in the Wind of the Hot O Supergiant ζ Puppis”. The Astrophysical Journal. 494 (2): 799. Bibcode:1998ApJ...494..799E. doi:10.1086/305218.
Walborn, Nolan R.; Howarth, Ian D.; Evans, Christopher J.; Crowther, Paul A.; Moffat, Anthony F. J.; St-Louis, Nicole; Farina, Cecilia; Bosch, Guillermo L.; Morrell, Nidia I. (2010). “The Onfp Class in the Magellanic Clouds”. The Astronomical Journal. 139 (3): 1283. arXiv:1001.4032. Bibcode:2010AJ....139.1283W. doi:10.1088/0004-6256/139/3/1283.
Maíz Apellániz, J.; Alfaro, E. J.; Sota, A. (2008). “Accurate distances to nearby massive stars with the new reduction of the Hipparcos raw data”. 0804: 2553. arXiv:0804.2553. Bibcode:2008arXiv0804.2553M. Chú thích journal cần |journal= (trợ giúp)