1. Barbuceanu, M. and Fox, M. (1994) The information agent: an infrastructure for collaboration in the integrated enterprise, in Proceedings of the Second International Working Conference on Cooperating Knowledge Based Systems, University of Keele, 14?17 June.
2. Chandrasekaran, B. (1981) Natural and social system metaphors for distributed problem solving: introduction to the issue. IEEE Transactions on Systems, Man and Cybernetics, 11 (1), 1?5.
3. Christensen, J. H. (1994) Holonic manufacturing systems: initial architecture and standards directions, in First European Conference on Holonic Manufacturing Systems, Hanover, Germany, December.
4. Christensen, J. H., Struger, O. J., Norrie, D. H. and Schaeffer, C. (1994) Material handling requirements in holonic manufacturing systems, International Symposium on Materials Handling Research, Grand Rapids, MI, 12?15 June.
5. Duffie, N. A., Chitturi, R. and Mou, J. (1987) Fault-tolerant heterarchical control of heterogeneous manufacturing system entities. Journal of Manufacturing Systems, 7, 315?327.