1. Davidsen P. I.1990.System Dynamics a Pedagogical Approach to the Teaching of Complex Dynamic Systems by Means of Simulation. In Proceedingsof EURIT 90(European Conference on Technology and Education).
2. Davidsen P. I.1992.The Structure‐Behavior Diagram: Understanding the Relationship Between Structure and Behavior in Complex Dynamic Systems.In Proceedings of the1992 InternationalSystem Dynamics Conference Utrecht Netherlands.
3. Eklund K.1988.Vår ekonomi [Our Economy]. Stockholm.
4. IMTEC (International Movements Toward Educational Change).1989.Evaluering av handh'ngsprogrammet “Datateknologi i skolen.” Report16. Oslo.