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Keenan, P. C.; McNeil, R. C. (1989). "The Perkins catalog of revised MK types for the cooler stars". The Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
Davies, Ben; Figer, Don F.; Law, Casey J.; Kudritzki, Rolf-Peter; Najarro, Francisco; Herrero, Artemio; MacKenty, John W. (2008). "The Cool Supergiant Population of the Massive Young Star Cluster RSGC1". The Astrophysical Journal. 676 (2): 1016–1028. arXiv:0711.4757. Bibcode:2008ApJ...676.1016D. doi:10.1086/527350. S2CID15639297.
Garcia, B. (1989-06-01). "A list of MK standard stars". Bulletin d'Information du Centre de Donnees Stellaires. 36: 27. Bibcode:1989BICDS..36...27G. ISSN1169-8837.
Humphreys, R. M.; Weis, K.; Davidson, K.; Bomans, D. J.; Burggraf, B. (2014). "Luminous and Variable Stars in M31 and M33. II. Luminous Blue Variables, Candidate LBVs, Fe II Emission Line Stars, and Other Supergiants". The Astrophysical Journal. 790 (1): 48. arXiv:1407.2259. Bibcode:2014ApJ...790...48H. doi:10.1088/0004-637X/790/1/48. S2CID119177378.
Humphreys, Roberta M.; Davidson, Kris; Grammer, Skyler; Kneeland, Nathan; Martin, John C.; Weis, Kerstin; Burggraf, Birgitta (2013). "Luminous and Variable Stars in M31 and M33. I. The Warm Hypergiants and Post-Red Supergiant Evolution". The Astrophysical Journal. 773 (1): 46. arXiv:1305.6051. Bibcode:2013ApJ...773...46H. doi:10.1088/0004-637X/773/1/46. S2CID118413197.
Maund, J. R.; Fraser, M.; Ergon, M.; Pastorello, A.; Smartt, S. J.; Sollerman, J.; Benetti, S.; Botticella, M. -T.; Bufano, F.; Danziger, I. J.; Kotak, R.; Magill, L.; Stephens, A. W.; Valenti, S. (2011). "The Yellow Supergiant Progenitor of the Type II Supernova 2011dh in M51". The Astrophysical Journal. 739 (2): L37. arXiv:1106.2565. Bibcode:2011ApJ...739L..37M. doi:10.1088/2041-8205/739/2/L37. S2CID118993104.
Lagadec, E.; Zijlstra, A. A.; Oudmaijer, R. D.; Verhoelst, T.; Cox, N. L. J.; Szczerba, R.; Mékarnia, D.; Van Winckel, H. (2011). "A double detached shell around a post-red supergiant: IRAS 17163-3907, the Fried Egg nebula". Astronomy & Astrophysics. 534: L10. arXiv:1109.5947. Bibcode:2011A&A...534L..10L. doi:10.1051/0004-6361/201117521. S2CID55754316.
Davies, Ben; Figer, Don F.; Law, Casey J.; Kudritzki, Rolf-Peter; Najarro, Francisco; Herrero, Artemio; MacKenty, John W. (2008). "The Cool Supergiant Population of the Massive Young Star Cluster RSGC1". The Astrophysical Journal. 676 (2): 1016–1028. arXiv:0711.4757. Bibcode:2008ApJ...676.1016D. doi:10.1086/527350. S2CID15639297.
Humphreys, R. M.; Weis, K.; Davidson, K.; Bomans, D. J.; Burggraf, B. (2014). "Luminous and Variable Stars in M31 and M33. II. Luminous Blue Variables, Candidate LBVs, Fe II Emission Line Stars, and Other Supergiants". The Astrophysical Journal. 790 (1): 48. arXiv:1407.2259. Bibcode:2014ApJ...790...48H. doi:10.1088/0004-637X/790/1/48. S2CID119177378.
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Zsoldos, E.; Percy, J. R. (1991). "Photometry of yellow semiregular variables - Rho Cassiopeiae". Astronomy and Astrophysics. 246: 441. Bibcode:1991A&A...246..441Z. ISSN0004-6361.
Achmad, L.; Lamers, H. J. G. L. M.; Nieuwenhuijzen, H.; Van Genderen, A. M. (1992). "A photometric study of the G0-4 Ia(+) hypergiant HD 96918 (V382 Carinae)". Astronomy and Astrophysics. 259: 600. Bibcode:1992A&A...259..600A. ISSN0004-6361.
Napiwotzki, R.; Schoenberner, D.; Wenske, V. (1993). "On the determination of effective temperature and surface gravity of B, A, and F stars using Stromgren UVBY beta photometry". Astronomy and Astrophysics. 268: 653. Bibcode:1993A&A...268..653N. ISSN0004-6361.
Garcia, B. (1989-06-01). "A list of MK standard stars". Bulletin d'Information du Centre de Donnees Stellaires. 36: 27. Bibcode:1989BICDS..36...27G. ISSN1169-8837.