- ^ Stellar Spectral Types, entry at hyperphysics.phy-astr.gsu.edu, accessed on line June 19, 2007.
- ^ Empirical bolometric corrections for the main-sequence, G. M. H. J. Habets and J. R. W. Heintze, Astronomy and Astrophysics Supplement 46 (November 1981), pp. 193–237, Tables VII and VIII.
- ^ Ledrew, Glenn (2001). “The Real Starry Sky”. Journal of the Royal Astronomical Society of Canada 95: 32 .
- ^ SIMBAD, entries on Sirius A and Vega, accessed June 19, 2007.