1. Low-thrust chemical orbit transfer propulsion;Pelouch,1979
2. Orbit transfer propulsion and large space systems;Kunz;J. Spacecraft,1980
3. Propulsion requirements for controllable satellites;Edelbaum;ARS J.,1961
4. Optimum low-thrust transfer between circular and elliptic orbits;Edelbaum,1962
5. Optimal low-thrust limited power transfers between any elliptical orbits;Marec,1976