1. Zhao ZM, Zhao CY, Mu Y, Sheng Y and Li J. 2011. Contributions of root respiration to total soil respiration before and after frost in Populus euphratica forest. Journal of Plant Nutrition and Soil Science, 174: 884-890.
2. Li J, Zhao CY, Song YJ, Zhu H and Sheng Y. 2010. Spatial patterns of desert annuals in relation to shrub effects on soil moisture. Journal of vegetation science, 21:221-232.
3. Zhu Hong, Zhao Chenyi, Li Jun et al. 2008. Analysis of impact factors on scrubland soil respiration in the southern Gurbantunggut Desert, central Asia. Environmental Geology, 54: 1403-1409.
4. Jun Li, Chengyi Zhao, Hong Zhu et al. 2007. Effect of plant species on shrub fertile island at an oasis-desert ecotone in the south Junggar Basin, China. Journal of Arid Environments, 71: 350-361. 5. Li Jun, Zhao Chengyi, Zhu Hong et al. 2007. Multi-scale heterogeneity of soil moisture following snow thawing in Haloxylon ammodendron Bge. shrubland. Science in China (Ser. D), 50: 49-55.