J. Vondrák, N. Capitaine, P. Wallace: New precession expressions, valid for long time intervals. In: Astronomy & Astrophysics. 534. Jahrgang, 1. Oktober 2011, ISSN0004-6361, S.A22, doi:10.1051/0004-6361/201117274 (englisch, aanda.org).
J. Vondrák, N. Capitaine, P. Wallace: New precession expressions, valid for long time intervals. In: Astronomy & Astrophysics. 534. Jahrgang, 1. Oktober 2011, ISSN0004-6361, S.A22, doi:10.1051/0004-6361/201117274 (englisch, aanda.org).
grahamhancock.com
Anubis, Companion to Osiris - Graham Hancock Official Website. (grahamhancock.com [abgerufen am 18. Juni 2017]).
harvard.edu
ui.adsabs.harvard.edu
I. A. Usenko, V. G. Klochkova: Polaris B, an optical companion of the Polaris (α UMi) system: atmospheric parameters, chemical composition, distance and mass; in: Monthly Notices of the Royal Astronomical Society: Letters, Vol. 387, Issue 1, S. L1–L3, bibcode:2008MNRAS.387L...1U
Evans et al.: Direct Detection of the Close Companion of Polaris with the Hubble Space Telescope; in: The Astronomical Journal, Vol. 136, Issue 3, S. 1137–1146, bibcode:2008AJ....136.1137E
Evans et al.: Polaris: Mass and Multiplicity; in: Binary Stars as Critical Tools & Tests in Contemporary Astrophysics, Proceedings of IAU Symposium #240, held 22–25 August, 2006 in Prague, Czech Republic; Cambridge University Press, 2007, S. 102–104, bibcode:2007IAUS..240..102E
J. Vondrák, N. Capitaine, P. Wallace: New precession expressions, valid for long time intervals. In: Astronomy & Astrophysics. 534. Jahrgang, 1. Oktober 2011, ISSN0004-6361, S.A22, doi:10.1051/0004-6361/201117274 (englisch, aanda.org).