Howell, K; Barden, B; Lo, M (1997). "Application of Dynamical Systems Theory to Trajectory Design for a Libration Point Mission". Journal of Astronautical Sciences. 45 (2): 161–178. Bibcode:1997JAnSc..45..161H. doi:10.1007/BF03546374.
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Howell, K; Barden, B; Lo, M (1997). "Application of Dynamical Systems Theory to Trajectory Design for a Libration Point Mission". Journal of Astronautical Sciences. 45 (2): 161–178. Bibcode:1997JAnSc..45..161H. doi:10.1007/BF03546374.