1. 1) R. M. Myers, S. R. Oleson, F. M. Curran, and S. J. Scheneider:
AIAA Paper (1994) 94-2997.
2. 2) J. Mueller: AIAA Paper (1997) 97-3058.
3. 3) S. Leifer: AIAA Paper (1998) 98-3183.
4. 4) M. M. Micci and A. D. Ketsdever(ed.): Micropropulsion for Small
Spacecraft, Prog. Aeronautics and Astronautics 187 (AIAA, Reston,
2000).
5. 5) R. G. Jahn: Physics of Electric Propulsion, (McGraw-Hill, 1968)
p.198-316.