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Yi, Bo-Wen; Xu, Jin-Hua; Fan, Ying . (2019). Coordination of policy goals between renewable portfolio standards and carbon caps: A quantitative assessment in China. Applied Energy, 237(), 25–35. doi:10.1016/j.apenergy.2018.12.015 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research