Holmberg, J.; et al. The Geneva-Copenhagen survey of the Solar neighbourhood. II. New uvby calibrations and rediscussion of stellar ages, the G dwarf problem, age-metallicity diagram, and heating mechanisms of the disk. Astronomy & Astrophysics. 2007, 475 (2): 519–537. Bibcode:2007A&A...475..519H. S2CID 119054949. arXiv:0707.1891. doi:10.1051/0004-6361:20077221.
Ginestet, N.; et al. Spectral classifications in the near infrared of stars with composite spectra. III. Study of a sample of 137 objects with the Aurelie spectrograph. Astronomy and Astrophysics Supplement. 1999, 134 (3): 473. Bibcode:1999A&AS..134..473G. doi:10.1051/aas:1999444.
Holmberg, J.; et al. The Geneva-Copenhagen survey of the Solar neighbourhood. II. New uvby calibrations and rediscussion of stellar ages, the G dwarf problem, age-metallicity diagram, and heating mechanisms of the disk. Astronomy & Astrophysics. 2007, 475 (2): 519–537. Bibcode:2007A&A...475..519H. S2CID 119054949. arXiv:0707.1891. doi:10.1051/0004-6361:20077221.
Ginestet, N.; et al. Spectral classifications in the near infrared of stars with composite spectra. III. Study of a sample of 137 objects with the Aurelie spectrograph. Astronomy and Astrophysics Supplement. 1999, 134 (3): 473. Bibcode:1999A&AS..134..473G. doi:10.1051/aas:1999444.
Holmberg, J.; et al. The Geneva-Copenhagen survey of the Solar neighbourhood. II. New uvby calibrations and rediscussion of stellar ages, the G dwarf problem, age-metallicity diagram, and heating mechanisms of the disk. Astronomy & Astrophysics. 2007, 475 (2): 519–537. Bibcode:2007A&A...475..519H. S2CID 119054949. arXiv:0707.1891. doi:10.1051/0004-6361:20077221.
Holmberg, J.; et al. The Geneva-Copenhagen survey of the Solar neighbourhood. II. New uvby calibrations and rediscussion of stellar ages, the G dwarf problem, age-metallicity diagram, and heating mechanisms of the disk. Astronomy & Astrophysics. 2007, 475 (2): 519–537. Bibcode:2007A&A...475..519H. S2CID 119054949. arXiv:0707.1891. doi:10.1051/0004-6361:20077221.