13th ESA Symposium on European Rocket and Balloon Programmes and Related Research : proceedings, Öland, Sweden, 26-29 May 1997. pp.477-482, 1997. Noordwijk, The Netherlands. ESA Publications Division
12th ESA Symposium on European Rocket and Balloon Programmes and Related Research, Lillehammer, Norway, 29 May-1 June 1995. pp.95-100, 1995. Noordwijk, The Netherlands. ESA Publications Division