1. Jackson, F. A. , etal; "An Operational Electrothermal PropulsionSystem for Spacecraft Reaction Control, 'AIAA Paper 66-213, March 1966.
2. Hunter, R. E. , etal; "Cesium Contact Ion Microthruster Ekperiment Aboard Applications Technology Satellite (ATSbN, '' AIAA Paper 69-297, March 1969.
3. Guman, W.J. , and Nathanson, D.M,"Pulsed Plasma Microthruster Propulsion System for Synchronous Orbit Satellite, AIAA Papr 69-298, March 1969.