1. Low-thrust trajectories—a bibliography;Pitkin;J. Astronaut. Sci.,1966
2. Optimum low-thrust rendezvous and station keeping;Edelbaum;AIAA J,1964
3. Optimal variable-thrust transfer of a power-limited rocket between neighboring circular orbits;Gobetz;AIAA J,1964
4. A linear theory of optimum low-thrust rendezvous trajectories;Gobetz;J. Astronaut. Sci.,1965
5. Transferts economiques entre orbites infiniment proches;Marec;ONERA TP No. 270,1965