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Baer, James; Steven R. Chesley (2008). "Astrometric masses of 21 asteroids, and an integrated asteroid ephemeris". Celestial Mechanics and Dynamical Astronomy. Springer Science+Business Media B.V. 2007. 100 (2008): 27-42. Bibcode:2008CeMDA.100...27B. doi:10.1007/s10569-007-9103-8.