WASET
    Kevin Spencer G. Anglim and  Zhenyu Zhang and  Qingbin Gao,  Minimum-Fuel Optimal Trajectory for Reusable First-Stage Rocket Landing Using Particle Swarm Optimization.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2017, vol. 125(5). 981 - 990
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10007013.