1. 1992. The Environment for Sale. Carlton Press: New York.
2. 2000. Charting new waters: public involvement in the management of international watercourses. In UNU Workshop on Southern African International Waters, 25-26 September, Sandton, South Africa.
3. CNN. 2003. Archives of the previous news by the CNN. http://www.cnn.com/ [24 June 2003].
4. The environmental management of large international basins
5. 2000. Europe and Central America?16 years of the San José dialogue. In Workshop ?Dollars, Democracy and Trade: The External Influence on Economic Integration in the Americas?, Los Angeles, 18 May.