1. M. Patterson, J. Foster, T. Haag, V. Rawlin and G. Soulas, NEXT: NASA's Evolutionary Xenon Thruster, AIAA-2002-3832, 2002 Joint Propulsion Conference, Indianapolis, Indiana,July2002.
2. Noca, M., Frisbee, R., Johnson, L., Kos, L., Gefert, L., Dudzinski, L., Evaluating Advanced Propulsion Systems for the Titan Explorer Mission, IEPC-01-175, 27thIEPC, Oct. 2001, Pasadena, CA.
3. Neptune Orbiter Mission Package, In-Space Integrated Space Transportation Activity by the IISTP Systems Analysis Team, Apr. 4th, 2001, (contactLarry Kos, MSFC. 256 544-1522)