1. China's water shortage could shake world food security;Brown;World Watch,1998
2. Optional water development strategies for the Yellow River Basin: Balancing agricultural and ecological water demands;Cai;Water Resour. Res.,2004
3. Cai, X., 2006. Water stress, water transfer and social equity in Northern China: implication for policy reforms. Human Development Report 2006, UNEP, http://hdr.undp.org/en/reports/global/hdr2006/papers/cai ximing.pdf.
4. Monitoring barley and corn growth from remote sensing data at field scale;Calera;Int. J. Remote Sens.,2004
5. Preface;Chen;Geomorphology,1996