1. The Control and Use of Libration-Point Satellites;Farquhar;NASA TR R-346,1970
2. Future Missions for Libration-Point Satellites;Farquhar;Astronautics and Aeronautics,1969
3. Mission Design for a Halo Orbiter of the Earth;Farquhar;Journal of Spacecraft and Rockets,1977
4. Numerical Determination of Libration-Point Trajectories With Out-of-Plane Maneuvers to Avoid the Solar Exclusion Zone;Pernicka;Orbital Mechanics and Mission Design, Advances in the Astronautical Sciences,1989
5. Trajectories and Orbital Maneuvers for the First Libration-Point Satellite;Farquhar;Journal of Guidance and Control,1980