1. HOWELL, K.C., MAINS, D. L., and BARDEN, B.T. “Transfer Trajectories From Earth Parking Orbits to Sun-Earth Halo Orbits,” AAS Paper 94-160, AIAA/AAS Spaceflight Mechanics Meeting, Cocoa Beach, Florida, February 1994.
2. HOWELL, K. C., BARDEN, B. T., and LO, M. W. “Application of Dynamical Systems Theory to Trajectory Design for a Libration Point Mission,” Journal of the Astronautical Sciences, Vol. 45, No. 2, 1997, pp. 161–178.
3. GOMEZ, G., JORBA, A., MASDEMONT, J., and SIMÓ, C. “Final Report: Study Refinement of Semi-Analytical Halo Orbit Theory,” ESOC Contract Report, Technical Report 8625/89/D/MD(SC), Barcelona, Spain, April 1991.
4. GÓMEZ, G., JORBA, A., MASDEMONT, J., and SIMÓ, C. “Study of the Transfer from the Earth to a Halo Orbit Around the Equilibrium Point L1,” Celestial Mechanics and Dynamical Astronomy, Vol. 56, No. 4, 1993, pp. 541–562.
5. GÓMEZ, G., JORBA, A., MASDEMONT, J., and SIMÓ, C. “Moon’s Influence on the Transfer from the Earth to a Halo Orbit Around L1,” Predictability, Stability, and Chaos in N-Body Dynamical Systems (A. E. Roy, ed.), pp. 283–290, New York: Plenum Press, 1991.