4Anqing Shi. 2003. The Impact of Population Pressure on Global Carbon Dioxide Emissions, 1975-1996: Evidence from Pooled Cross- country Data. Ecological Economics 44, pp29- 42.
5Arthur E. Hoerl, Robert W. Kennard. 2000. Ridge Regression: Biased Estimation for Nonorthogonal Problems. Technometrics 42 (1), pp80- 86.
6Birdsall N. 1992. Another Look at Population and Global Warming: Population, Health and Nutrition Policy Research, Working Paper. Washington, DC: World Bank, WPS 1020. http://www - wds. worldbank. org/servlet --/WDSContentServer/WDSP/IB/1992/11/01/000009265 _ 3961003163411/Rendered/PDF/multi_page. pdf.
7BP. 2009. BP Statistical Review of World Energy 2009. http://www. bp. com.
8CDIAC. 2009. Preliminary 2007- 08 Global & National Estimates. http://cdiac. ornl. gov.
9Cole Matthew and Eric Neumayer. 2004. Examing the Impacts of Demographic Factors on Air Pollution. Population and Environment 26, pp5- 21.
10David Satterthwaite. 2009. The Implications of Population Growth and Urbanization for Climate Change. Environment and Urbanization 21(2), pp545-567.
