1. The economic effect of climate change on US agriculture;Adams,1999
2. Using the special sensor microwave imager to monitor surface wetness;Basist;Journal of Hydrometeorology,2001
3. The impact of global warming on agriculture: comment;Cline;American Economic Review,1996
4. The impacts of global warming on agriculture: a Ricardian analysis: comment;Darwin;American Economic Review,1999
5. DEAT (Department of Environmental Affairs and Tourism), 2006. van Schalkwyk: World Congress of International Council of Local Environmental Initiatives. DEAT, South Africa. 〈http://www.polity.org.za/article.php?a_id=81907〉 (Accessed 15.05.06).