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Proceedings of the European Space Power Conference, Poitiers, France, 4-8 September 1995. pp.367-370, 1995. Noordwijk, Netherlands. ESA Publications Division
Proceedings of the Fifth European Space Power Conference (ESPC) : Tarragona, Spain, 21-25 September 1998. pp.527-532, 1998. Noordwijk, The Netherlands. ESA Publications Division
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