T_eff_ of B, A and F main sequence stars from the continuum between 3200 A and 3600 A. Astronomy and Astrophysics Supplement. May 1995, 110: 553-564. Bibcode:1995A&AS
Swift, C. Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5. Michigan Spectral Survey. 1999, 05: 0. Bibcode:1999MSS...C05...
on line November 23, 2010. Ginestet, N.; Carquillat, J. M.; Jaschek, C. Spectral classifications in the near infrared of stars with composite spectra. III
, Kaler, James. Stars and their spectra : an introduction to the spectralsequence. Cambridge [Cambridgeshire]: Cambridge University Press. 1989. ISBN 978-0521304948