^
abHouk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan,
Bibcode:
1978mcts.book.....H.
^
abCharbonnel, C.; Lagarde, N.; Jasniewicz, G.; North, P. L.; Shetrone, M.; Krugler Hollek, J.; Smith, V. V.; Smiljanic, R.; Palacios, A.; Ottoni, G. (2020), "Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era", Astronomy and Astrophysics, 633: A34,
arXiv:1910.12732,
Bibcode:
2020A&A...633A..34C,
doi:
10.1051/0004-6361/201936360,
S2CID204907220.
^Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.;
Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18", Astronomy and Astrophysics, 628: A94,
arXiv:1904.11302,
Bibcode:
2019A&A...628A..94A,
doi:
10.1051/0004-6361/201935765,
S2CID131780028.
^Eggen, O. J. (February 1985), "A systematic search for members of the Hyades supercluster. V. The red giants.", Astronomical Journal, 90: 333–340,
Bibcode:
1985AJ.....90..333E,
doi:
10.1086/113736.