1. Chen Dongjing, Xu Zhongmin, 2001. Application and discussion of ecological footprint in arid areas of China: a case study in Xinjiang Uygur Autonomous Region. Arid Land Geography, 4: 305–309. (in Chinese)
2. Chen Guojie, 2002. On ecological security. Chongqing Environmental Science, 24(3): 1–3. (in Chinese)
3. Li Jianlao, Ren Yangjun, 2002. Pay close attention to the thing that the ecology of the Northwest, realizes economic sustainable development safely. Journal of Soil and Water Conservation, 16(5): 39–41. (in Chinese)
4. Li Jinhai, 2001. Regional ecological carrying capacity and sustainable development. China Population, Resources and Environment, 11(3): 76–78. (in Chinese)
5. Liu Yansui, 2001. Structural analysis and optimal use of land types in mountainous regions. Acta Geographica Sinica, 56(4): 426–436. (in Chinese)