9Neha Khanna, Florenz Plassmann. The demand for environmental qualityand the environmental Kuznets Curvehypothesis[J].Eeological Economics, 2004,51:225 - 236.
10Ariaster B. Chimeli, John B. Braden. Total Factor Productivity and the Environmental Kuznets curve [J].Joumal of Environmental Economics and Management, 2005,49(2): 366 - 380.