1. (1) A. Fruchtma: “Limits on the efficiency of several electric thruster configurations”, Phys. Plasmas, Vol. 10, p. 2100 (2003)
2. (2) H. Koizumi, et al.: “Plasma acceleration processes in an ablative pulsed plasma thruster”, Phys. Plasmas, Vol. 14, 033506 (2007)
3. (3) J. Gilland, et al.: “Electric Propulsion Concepts Enabled by High Power Systems for Space Drive”, NASA/TM-2005-213371, AIAA-2005-5690 (2005)
4. (4) S. Hosoda and H. Kuninaka: “The Homeward Journey of Asteroid Explorer “Hayabusa” Powered by the Ion Engines”, J. Plasma Fusion Res., Vol. 86, No. 5, pp. 282-292 (2010) (in Japanese)
5. (5) H. Tahara: “Recent Research and Development of Electric Thrusters and Plasma Technology”, J. Plasma Fusion Res., Vol. 83, No. 3, pp. 265-270 (2007) (in Japanese)