1. Reconnaissance mission to near-earth asteroids;Anselmo;The Journal of Astronautical Sciences,1991
2. Accessibility of near-earth asteroids;Lau;Journal of Guidance, Control, and Dynamics,1987
3. Program manual for HILTOP, a heliocentric interplanetary low thrust trajectory optimization program;Mann,1974
4. Mission options for rendezvous with the most accessible near-earth asteroid - 1989 ML;McAdams,1992
5. Electric propulsion in Europe;Bartoli,1995