@book{ BC12537268,
 author = "AAS/AIAA Spaceflight Mechanics Meeting and American Institute of Aeronautics and Astronautics and American Astronautical Society and Wilson, Roby S. and Shan, Jinjun and Howell, Kathleen C. and Hoots, Felix R.",
 title = "Astrodynamics 2020 : proceedings of the AAS/AIAA Astrodynamics Specialist Conference held August 9-12, 2020, virtual event",
 publisher = "Published for the American Astronautical Society by Univelt",
 year = "2021",
 series = "Advances in the astronautical sciences",
 number = "v.175",
 URL = "https://ci.nii.ac.jp/ncid/BC12537268"
}
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