«The Colour of Stars», Commonwealth Scientific and Industrial Research Organisation, Australia Telescope, Outreach and Education, 21 de dezembro de 2004, consultado em 16 de janeiro de 2012
doi.org
dx.doi.org
De Medeiros, J. R.; et al. (novembro de 2002), «A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars», Astronomy and Astrophysics, 395: 97–98, Bibcode:2002A&A...395...97D, doi:10.1051/0004-6361:20021214
Luck, R. E. (setembro de 1979), «The chemical compositions of nine southern supergiant stars», Astrophysical Journal, Part 1, 232: 797–806, Bibcode:1979ApJ...232..797L, doi:10.1086/157340
harvard.edu
ui.adsabs.harvard.edu
Wielen, R.; et al. (1999), Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions (35), Astronomisches Rechen-Institut Heidelberg, Bibcode:1999VeARI..35....1W
De Medeiros, J. R.; et al. (novembro de 2002), «A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars», Astronomy and Astrophysics, 395: 97–98, Bibcode:2002A&A...395...97D, doi:10.1051/0004-6361:20021214
Johnson, H. L.; et al. (1966), «UBVRIJKL photometry of the bright stars», Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J
Luck, R. E. (setembro de 1979), «The chemical compositions of nine southern supergiant stars», Astrophysical Journal, Part 1, 232: 797–806, Bibcode:1979ApJ...232..797L, doi:10.1086/157340