Expressions for the Celestial Intermediate Pole and Celestial Ephemeris Origin consistent with the IAU 2000A precession-nutation modelN. Capitaine, J. Chapront, S. Lambert and P. T. WallaceA&A, 400 3 (2003) 1145-1154DOI: https://doi.org/10.1051/0004-6361:20030077
