1. J. W. Emhoff, I. D. Boyd, "Progress In NEXT Ion Optics Modeling",AIAA 2004-3786,40thJoint Propulsion Conference, 11-14 July2004,Ft.Lauderdale.
2. M. Tartz, E. Hartmann, R. Deltschew, H. Neumann, "Grid erosion study of a multi-grid ion thruster", AIAA 1998-3646, 34thJointPropulsionConf.,Cleveland,13.16.07.(1998).
3. C. C. Farnell, J. D. Williams, P. J. Wilbur, "Numerical simulation of ion thruster optics", IEPC-2003-73,28th Int. Electric Propulsion Conf., Toulouse, 17.21.March 2003; J. D.Williams, C. C. Farnell, D. M. Laufer, R. A. Martinez, "HiPEP ion optics systemevaluationusinggridlets",AIAA2004-3814,40thJointPropulsionConference,11-14July2004,Ft.Lauderdale.
4. J. Wang, Y. Cao, R. Kafafy, and J. Pierru, "Ion Propulsion Simulations Using Parallel Supercomputer", IEPC-2005-271,29th InternationalElectric PropulsionConference,PrincetonUniversity,October 31- November 4,2005.