@article{Ivashkin_2009,
title={On the prevention of a possible collision of asteroid Apophis with the Earth},
volume={43},
ISSN={1608-3423},
url={http://dx.doi.org/10.1134/s0038094609060033},
DOI={10.1134/s0038094609060033},
number={6},
journal={Solar System Research},
publisher={Pleiades Publishing Ltd},
author={Ivashkin,
V. V. and Stikhno,
C. A.},
year={2009},
month=dec,
pages={483–496} }