Ren, W., Tian, H., Tao, B., Chappelka, A., Sun, G., Lu, C.Q., Liu, M.L., Chen, G.S., Xu, X.F. (2011) Impacts of tropospheric ozone and climate change on net primary productivity and net carbon exchange of China’s forest ecosystems. Global Ecology and Biogeography. doi: 10.1111/j.1466-8283.2010.00606.x