Exploration of opportunity costs and consideration exploration of opportunity costs and consideration for future generations: Two lasting contributions to systems thinking Richard O. Mason Papers Pages: 367 - 375
The biocybernetic approach as a basis for planning our environment Frederic Vester Papers Pages: 399 - 413
Churchman's “process of unfolding”—Its significance for policy analysis and evaluation Werner Ulrich Papers Pages: 415 - 428
