International Congress on Technology Assessment.International Congress on Technology Assessment (2nd : 1976 : Univ. of Michigan)：Technology assessment : greative futures.North Holland,1980.
.Technology Assessment and Management Conference of the Gottlieb Duttweiler Institute (1985 ; Ruschlikon)：Artificial intelligence in manufacturing key to integration.NHPC,1987.
Technology Assessment and Management Conference of the Gottlieb Duttweiler Institute (1985 ; Ruschlikon)：Artificial intelligence in manufacturing key to integration
IFIP TC9 International Conference on Human Choice and Computers.IFIP TC9 International Conference on Human Choice and Computers (4th : 1990 : Dublin, Lreland)：Information technology assessment.IFIP,1991.
