1. Ayres RU, Kneese AV (1969) Production, consumption and externalities. Am Econ Rev 59(3):282–297
2. Bao XB (2008) The impact assessment of soil and water conservation investment. J Econ Water Resour 26(4):23–26
3. Beijing Environmental Protection Bureau (2011) Beijing Environment Bulletin 2010 [EB/OL]. http://www.bjepb.gov.cn/portal0/tab181/ , 3 Jun 2011 (in Chinese)
4. Beijing Municipal Development and Reform Commission (2011) The Twelfth Five-Year Plan for the National Economic and Social Development of Beijing [EB/OL]. http://www.bjpc.gov.cn/fzgh_1/guihua/12_5/Picture_12_F_Y_P/ , 21 Jan 2011
5. Beijing Water Authority (2011) Beijing Water Resources Bulletin 2010 [EB/OL]. http://www.bjwater.gov.cn/tabid/207/Default.aspx , 8 Mar 2011 (in Chinese)