Table 4 in Levesque, Emily M.; Massey, Philip; Olsen, K. A. G.; Plez, Bertrand; Josselin, Eric; Maeder, Andre; Meynet, Georges (2005). «The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not as Cool as We Thought». The Astrophysical Journal628 (2): 973. doi:10.1086/430901. Bibcode: 2005ApJ...628..973L.
Table 4 in Levesque, Emily M.; Massey, Philip; Olsen, K. A. G.; Plez, Bertrand; Josselin, Eric; Maeder, Andre; Meynet, Georges (2005). «The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not as Cool as We Thought». The Astrophysical Journal628 (2): 973. doi:10.1086/430901. Bibcode: 2005ApJ...628..973L.