R.O. Gray, M.G. Napier, L.I. Winkler. The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars. „Astronomical Journal”. 121 (4), s. 2148–2158, 2001. DOI: 10.1086/319956. Bibcode: 2001AJ....121.2148G.
R.O. Gray, P.W. Graham, S.R. Hoyt. The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. II. Basic Parameters of Program Stars and the Role of Microturbulence. „Astronomical Journal”. 121 (4), s. 2159–2172, 2001. DOI: 10.1086/319957. Bibcode: 2001AJ....121.2159G.
R.O. Gray, M.G. Napier, L.I. Winkler. The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars. „Astronomical Journal”. 121 (4), s. 2148–2158, 2001. DOI: 10.1086/319956. Bibcode: 2001AJ....121.2148G.
R.O. Gray, P.W. Graham, S.R. Hoyt. The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. II. Basic Parameters of Program Stars and the Role of Microturbulence. „Astronomical Journal”. 121 (4), s. 2159–2172, 2001. DOI: 10.1086/319957. Bibcode: 2001AJ....121.2159G.
iau.org
Naming Stars. Międzynarodowa Unia Astronomiczna, 2018-08-10. [dostęp 2018-12-05].