1. Kyoto Protocol to the United Nations Framework Convention on Climate Change,1997
2. The Regional Impacts of Climate Change, An Assessment of Vulnerability;Watson,1997
3. United States Environmental Protection Agency/White House Initiative on Global Climate Change factsheet, http://www.whitehouse.gov/Initiatives/Climate/main.html, and related sites.
4. Development of Improved Stable Catalysts and Trace Element Capture for Hot Gas Cleaning,1996