1. Brouwer, D., & Clemence, G. M. 1961, Methods of Celestial Mechanics (New York: Academic Press)
2. Relativistic time scales in the solar system
3. Brumberg, V. A., & Simon, J.-L. 2004, in Astrometry, Geodynamics and Solar System Dynamics: from milliarcseconds to microarcseconds, ed. A. Finkelstein, & N. Capitaine (St. Petersburg: Institute of Applied Astronomy and Observatoire de Paris), 302
4. Bureau International des Poids et Mesures (BIPM) 2006, The International System of Units (SI), 8th edition
5. Capitaine, N. 2005, Documents of the IAU Working Group on Nomenclature, available at http://syrte.obspm.fr/iauWGnfa/index.html