1. Alexander C., Ishikawa, S. and Silverstein, M., 1977, A pattern language: Towns, buildings, construction, Oxford University Press, New York.
2. Bertalanffty, L. von, 1968, General systems theory, Brazilier, New York.
3. Checkland, P., 1981, Systems thinking, systems practice, John Wiley & Sons, New York.
4. Christakis, A.N., 1996, A People Science: The CogniScope™ System Approach, Systems, 1(1), 16–19.
5. Davies, I.K., 1995, Re-inventing ISD, In Seels, B.B. (Ed.), Instructional design fundamentals: A reconsideration (pp. 31–44), Educational Technology Publications, Englewood Cliffs, NJ.