1. Mitterauer J. Field emission electric propulsion. Spectroscopic investigations on slit emitters. Final Report, ESTEC contract 5051/81/NL/PB(SC), 1986
2. A liquid cesium field ion source for space propulsion;Bartoli;J Phys D: Appl Phys L,1984
3. Liquid metal ion sources as thrusters for electric space propulsion;Mitterauer;Journ de Physique C,1987
4. Aitken KL, Prewitt PD. Field emission electric propulsion: basic investigations of the ion emitting region. Final report, ESTEC contract 4462/806, 1983
5. Marcuccio S, Genovese A, Andrenucci M. FEEP thrusters: development status and prospects. Proceedings of the 2nd European Spacecraft Propulsion Conference, ESA SP-398, Noorwijk, The Netherlands, 1997