7IPCC. Climate Change 2007: The Physical Science Basis[M] Cambridge, UK: Cambridge University Press, 2007: 1-989.
8UNFP A. State of World Population 2007 : Unleashing the Potential of Urban Growth[M]. New York: UNFPA, 2008 : 41-57.
9Potere D, Schneider A. A critical look at representations of urban areas in global maps[J]. Geojoumal, 2007, 69 ( 1 ) : 55-80.
10Satterthwaite D. Cities' contribution to global warming: notes on the allocation of greenhouse gas emissions[J].Environment and Urbanization, 2008, 20 ( 2 ) : 539-549.
