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1. Yu. D. Medvedev, A. S. Zabotin: Determination of Orbits and Dispersion Ellipsoids of Asteroids Potentially Hazardous for the Earth // Protecting the Earth against Collisions with Asteroids and Comet Nuclei, In: A. M. Finkelstein, W. F. Huebner, V. A. Shor (Eds) Proceedings of the International Conference “Asteroid-Comet Hazard-2009”, StP: Nauka, 262–267 (2010)
2. A. S. Zabotin, Yu. D. Medvedev: On the accuracy of the orbit of asteroid (99942) APOPHIS at the time of its encounter with the Earth in 2029 // Astronomy Letters, 35(4), 278-285 (2009)
3. A. S. Zabotin, Yu. D. Medvedev : Determination of Orbits and Dispersion Ellipsoids of Asteroids Potentially Hazard for the Earth // Transactions of IAA RAS, issue 19, 68–78 (2009)