Weishou, S. , Di, J. , Hui, Z. , Shouguang, Y. , Haidong, L. , Naifeng, L. (2011), 'The Response Relation between Climate Change and NDVI over the Qinghai-Tibet plateau', World Academy of Science, Engineering and Technology, Open Science Index 59, International Journal of Environmental and Ecological Engineering, 5(11), 761 - 767.