1. Gunther·geller, Shinan Fang : submitted to Journal of Dongwu Academic(2012).
2. Ye Liu: submitted to Journal of Economic Issues(2011), In Chinese.
3. Chunwan Huang, Junhe Chen, Xiaobo Su: submitted to Journal of Tropical Geography(2006), In Chinese.
4. Chao Lu, Leina Wang : submitted to Journal of Resources Science(2011), In Chinese.
5. Yeqing Ma : submitted to Journal of Regional Economy(2012), In Chinese.