1. The oasis structural optimization system
2. The structural optimization system CAOS
3. ‘Numerical and experimental investigations on structural optimization of engineering designs’, Research Laboratory for Applied Structural Optimization at the Institute of Mechanics and Control Engineering, University of Siegen, F.R.G. 1986.
4. ‘Principles d'analyse de sensitivite, utilisation pour la conception optimale’, Rapports de Recherche No. 521, INRIA-Centre de Rocquencourt, France, Avril 1986.
5. and , Design Sensitivity Analysis of Structural Systems. Mathematics in Science and Engineering, Vol. 177, Academic Press, New York 1986.