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2. Modern Spacecraft Dynamics & Control;Kaplan,1976
3. Essential Spaceflight Dynamics and Magnetospherics;Rauschenbakh,2002
4. Global Optimisation of Multiple Gravity Assist Trajectories;Ceriotti,2010
5. Sensitivity of the gravity assist to variations of the impact parameter;Yefremov;Gravit. Cosmol.,2020