1. Aronson, D., 1996. Overview of Systems Thinking. Available at 〈http://www.thinking.net/Systems_Thinking/systems_thinking.html〉.
2. Cross-scale institutional linkages: perspectives from the bottom up;Berkes,2002
3. Linking social and ecological systems for resilience and sustainability;Berkes,1998
4. Boehlji, M.D., Hofing, S.L., Schroeder, R.C., 1999. Value chains in the agricultural industries. Department of Agricultural Economics Staff Papers. Purdue University.
5. Bryceson, D., 2000. Rural Africa at the crossroads: livelihood practices and policies. ODI Natural Resource Perspectives, vol. 52. London, UK.