1. Pollard J.E., Jackson D. E. and Marvin D. C. (editors): Electric Propulsion Flight Experience and Technology Readiness, pp. 7–8, (AIAA 93–2221). American Institute of Aeronautics and Astronautics, presented at the 29th joint propulsion conference and exhibit, June 28, 1993-June 30, 1993
2. Danzmann K. and Bender P.: LISA: Laser Interferometer Space Antenna., Horizon 2000 plus Forward, pp. iii, ESA, 96, December, 1995
3. Lau K., Colavita M., Blackwood G., Linfield R., Shao M. and Gallager D.: The New Millennium Formation Flying Optical Interferometer Journal, pp. 650–656. American Institute of Aeronautics and Astronautics, AIAA GNandC Conference, August, 1997
4. Wilson P.D., Hatt B. A. and Rogers T.: FEEP Emitter Module Industrialisation (Phase-2), (ESTEC Contract No. 6764/86, Report). September 19, 1989
5. Valentian D., Bugeat J., Petit R., Bartoli C. and Rohden M. V.: Application of Field Emission Thruster to Spacecraft Control and Orbit Positioning, AIAA, 25th Joint Propulsion Conference, Monterey, CA, July 10, 1989–July 10, 1989