7WISER R, LANGNISS O. Evaluation of the earlier stage for the RPS in Texas [R]. USA, 2002.
8RADER N, NORGAARD R. Efficiency and sustainability in restructured electricity markets: the Renewable Portfolio Standard [J]. The Electricity Journal, 1996, 9 ( 6): 37 -49.
9BERRY T, JACCARD M. The Renewable Portfolio Standard: design considerations and an implementation survey [ J ]. Energy Policy,2001, 29 (4): 263 -277.
10WISER R, HAMRIN J. Designing a renewables portfolio standard:principles, design options, and implications for China (report prepared for the China Sustainable Energy Project) [R ]. San Francisco: Center for Resource Solutions, 2000.
