Table 4 in Emily M. Levesque, Philip Massey, K. A. G. Olsen, Bertrand Plez i inni. The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought. „The Astrophysical Journal”. 628 (2), s. 973–985, August 2005. DOI: 10.1086/430901. arXiv:astro-ph/0504337. Bibcode: 2005ApJ...628..973L.
Table 4 in Emily M. Levesque, Philip Massey, K. A. G. Olsen, Bertrand Plez i inni. The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought. „The Astrophysical Journal”. 628 (2), s. 973–985, August 2005. DOI: 10.1086/430901. arXiv:astro-ph/0504337. Bibcode: 2005ApJ...628..973L.
Table 4 in Emily M. Levesque, Philip Massey, K. A. G. Olsen, Bertrand Plez i inni. The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought. „The Astrophysical Journal”. 628 (2), s. 973–985, August 2005. DOI: 10.1086/430901. arXiv:astro-ph/0504337. Bibcode: 2005ApJ...628..973L.