1. Optimal perilune altitude of lunar landing trajectory;Cho;International Journal of Aeronautical and Space Sciences,2009
2. Pseudospectral method knotting methods for solving optimal control problems;Fahroo;Journal of Guidance, Control, and Dynamics,2004
3. Hawkins, A.M. (2005). Constrained trajectory optimization of a soft lunar landing from a parking orbit.
4. Enhancing the manoeuvring capabilities of a lunar landing module using predictive guidance algorithms;Kozynchenko;Acta Astronautica,2010
5. Lee, A.Y. (2011). Optimal terminal descent guidance logic to achieve a soft lunar touchdown. California Institute of Technology.