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2. Mesarovic, M.D., D. Macko, and Y. Takahara (1970) Theory of Hierarchical, Multilevel, Systems Academic Press, New York 1970
3. Oren, T. (1989) Dynaimc Templates and Semantic Rules for Simulation Advisors and Certifiers To be published in: P.A. Fishwick and R.B. Modjeski (Eds.), Knowledge-Based Simulation: Methodology and Application Springer Verlag, Berlin, Heidelberg, New York, Tokyo
4. Praehofer, Herbert and Bernard P. Zeigler (1989) Modelling and Simulation of Non-Homogeneous Models Lecture Notes in Computer Science, Springer Verlag, Berlin (this volume)
5. Reynolds, R (1989) "Cooperation in Social Models", Biosystems (to appear).