Keenan, Philip C.; McNeil, Raymond C. The Perkins catalog of revised MK types for the cooler stars. Astrophysical Journal Supplement Series. 1989, 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
Grenier, S.; Baylac, M.-O.; Rolland, L.; Burnage, R.; Arenou, F.; Briot, D.; Delmas, F.; Duflot, M.; Genty, V.; Gómez, A. E.; Halbwachs, J.-L.; Marouard, M.; Oblak, E.; Sellier, A. Radial velocities. Measurements of 2800 B2-F5 stars for HIPPARCOS. Astronomy and Astrophysics Supplement. 1999, 137 (3): 451. Bibcode:1999A&AS..137..451G. doi:10.1051/aas:1999489.
Kovtyukh, V. V.; Chekhonadskikh, F. A.; Luck, R. E.; Soubiran, C.; Yasinskaya, M. P.; Belik, S. I. Accurate luminosities for F-G supergiants from FeII/FeI line depth ratios. Monthly Notices of the Royal Astronomical Society. 2010, 408 (3): 1568. Bibcode:2010MNRAS.408.1568K. doi:10.1111/j.1365-2966.2010.17217.x.
Royer, F.; Grenier, S.; Baylac, M.-O.; Gómez, A. E.; Zorec, J. Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i. Astronomy and Astrophysics. 2002, 393 (3): 897. Bibcode:2002A&A...393..897R. doi:10.1051/0004-6361:20020943.
Takeda, Yoichi; Sato, Bun'ei; Murata, Daisuke. Stellar Parameters and Elemental Abundances of Late-G Giants. Publications of the Astronomical Society of Japan. 2008, 60 (4): 781. Bibcode:2008PASJ...60..781T. doi:10.1093/pasj/60.4.781.
Eggen, Olin J. Photometry of F-K type bright giants and supergiants. 3: The luminosity, reddening, and heavy element abundance of GK stars. The Astronomical Journal. 1994, 107: 2184. Bibcode:1994AJ....107.2184E. doi:10.1086/117030.
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Keenan, Philip C.; McNeil, Raymond C. The Perkins catalog of revised MK types for the cooler stars. Astrophysical Journal Supplement Series. 1989, 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
Grenier, S.; Baylac, M.-O.; Rolland, L.; Burnage, R.; Arenou, F.; Briot, D.; Delmas, F.; Duflot, M.; Genty, V.; Gómez, A. E.; Halbwachs, J.-L.; Marouard, M.; Oblak, E.; Sellier, A. Radial velocities. Measurements of 2800 B2-F5 stars for HIPPARCOS. Astronomy and Astrophysics Supplement. 1999, 137 (3): 451. Bibcode:1999A&AS..137..451G. doi:10.1051/aas:1999489.
Kovtyukh, V. V.; Chekhonadskikh, F. A.; Luck, R. E.; Soubiran, C.; Yasinskaya, M. P.; Belik, S. I. Accurate luminosities for F-G supergiants from FeII/FeI line depth ratios. Monthly Notices of the Royal Astronomical Society. 2010, 408 (3): 1568. Bibcode:2010MNRAS.408.1568K. doi:10.1111/j.1365-2966.2010.17217.x.
Royer, F.; Grenier, S.; Baylac, M.-O.; Gómez, A. E.; Zorec, J. Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i. Astronomy and Astrophysics. 2002, 393 (3): 897. Bibcode:2002A&A...393..897R. doi:10.1051/0004-6361:20020943.
Takeda, Yoichi; Sato, Bun'ei; Murata, Daisuke. Stellar Parameters and Elemental Abundances of Late-G Giants. Publications of the Astronomical Society of Japan. 2008, 60 (4): 781. Bibcode:2008PASJ...60..781T. doi:10.1093/pasj/60.4.781.
Eggen, Olin J. Photometry of F-K type bright giants and supergiants. 3: The luminosity, reddening, and heavy element abundance of GK stars. The Astronomical Journal. 1994, 107: 2184. Bibcode:1994AJ....107.2184E. doi:10.1086/117030.