1. Amstein, S. (1969) A ladder of citizen participation, Journal of the American Institute of Planners 35, 216–224.
2. Blomquist, W. (1992) Dividing the water. Governing groundwater in southern California, San Francisco.
3. Blomquist, W., Schlager, E., Tang, S.Y. and Ostrom, E. (1994) Regularities from the field and possible explanations, in E. Ostrom, R. Gardner and J. Walker (eds.), Rules, games, and common-pool resources, Ann Arbor, pp. 301–318.
4. Bromley, D.W. (1992) Making the commons work. Theory, practice and policy, San Francisco.
5. Clark, C.A. (1990) Computer assisted public evaluation of environmental policy choices, Los Angeles.