Conference on Academic and Industrial Cooperation in Space Research : Vienna, Austria, November 4-6 1998. pp.153-162, 1998. Noordwijk, Netherlands. ESA Publications Division
Second European Spacecraft Propulsion Conference : 27-29 May, 1997, ESTEC, Noordwijk, The Netherlands. pp.377-382, 1997. Noordwijk, Netherlands. ESA Publications Division