1. ‘Pattern predicition methods for high performance single and reflector antennas’, ESTEC Contract 3629/78/NL/AK, Ticra Report, S-101-02, Ticra, Copenhangen, Denmark, 1979
2. ‘New concepts in multirefletor antenna analysis’, ESTEC Contract 4386/80/NL/DG, Ticra Report, S-137-06, Ticra, Copenhagen, Denmark, 1983