Computer applications in production and engineering : proceedings of the second International IFIP conference on computer applications in production and engineering, CAPE '86, Copenhagen, Denmark, 20-23 May, 1986 / ed. by K. Bø ... [et al.]CAD systems framework : proceedings of the WG 5.2 Working Conference on CAD Systems Framework held in Røros, Norway, 15-17 June 1982 / ed. by K. Bø and F.M. Lillehagen