1. Diverse unity: the principles and prospects for problem structuring methods;Rosenhead,1989
2. On linking approaches to decision-aiding: issues and prospects;Bennett;Journal of the Operational Research Society,1985
3. Mixing methods: introduction;Eden,1990
4. Towards a system of system methodologies;Jackson;Journal of the Operational Research Society,1984
5. Solving Problem Solving;Flood,1995