1. Libration point rendezvous;Edelbaum;Analytical Mech. Assoc. Rep.,1970
2. Optimal pursuit in space;Hamza;Z. Flugwiss,1973
3. Optimum low-thrust limited power transfers between arbitrary elliptical orbits;Marec;Acta Astronaut,1977
4. The study of the critical case of stability of motion around the equilateral Lagrangian points in the Earth-Moon system;Popescu,1981
5. On the optimum controlled movement around the Lagrangian points on the Earth-Moon system;Popescu;Rev. Roum. Sci. Techn.-Mec. Appl.,1981