1. The optimization of trajectories;Breakwell;J. Soc. Indust. appl. Math.,1959
2. Fuel requirements for crude interplanetary guidance;Breakwell;Adv. Astronaut. Sci.,1960
3. Researches in interplanetary transfer;Breakwell;ARS J.,1961
4. Trajectories launched normal to the ecliptic;Breakwell,1963
5. Matched asymptotic expansions, patched conics and the computation of interplanetary trajectories;Breakwell,1965