9Uchida,Emi,Jintao Xu,Scott Rozelle.Grain for Green:Cost-effectiveness and Sustainability of China's Conservation Set-aside Program.Land Economics,2005(5):247-264.
10Xu Zhigang,Michael Bennett,Tao Ran,Jintao Xu.Grain for Green:China's Sloping Land Conversion Program Four Years on:Current Situation and Pending Issues.International Forestry Review,2004 (6):317-327.