Proceedings of the Sixth European Space Power Conference (ESPC) : 6-10 May 2002, Porto, Portugal. pp.129-134, 2002. Noordwijk. ESA Publications Division
Proceedings of the Sixth European Space Power Conference (ESPC) : 6-10 May 2002, Porto, Portugal. pp.135-140, 2002. Noordwijk. ESA Publications Division
Proceedings of the Fifth European Space Power Conference (ESPC) : Tarragona, Spain, 21-25 September 1998. pp.715-720, 1998. Noordwijk, The Netherlands. ESA Publications Division