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Christou, A. A.; Asher, D. J. (2011). "A long-lived horseshoe companion to the EarthArkiverad 8 augusti 2017 hämtat från the Wayback Machine.". Monthly Notices of the Royal Astronomical Society 414 (4): 2965. arXiv:1104.0036. Bibcode:2011MNRAS.414.2965C. doi:10.1111/j.1365-2966.2011.18595.x.