1. Shunchuan Wu, Xiaoping Zhang, Yang Liu: Rock and Soil Mechanics Vol. 29(2008), pp.2899-2905, in Chinese.
2. Baotian Xu, Qihu Qian, Changhong Yan, et al: Chinese Journal of Rock Mechanics and Engineering Vol. 28(2009) , pp.3959-3964, in Chinese.
3. Baotian Xu, Changhong Yan, Hanyong Chen, et al: Rock and Soil Mechanics Vol. 29(2008), pp.3077-3081, in Chinese.
4. Jianjun Zhao, Runqiu Yang, Nengpan Ju, et al: Journal of Engineering Geology Vol. 14(2006), pp.743-746, in Chinese.
5. Runqiu Huang, Jingan Fu, Luangsang Chan: The Chinese Journal of Geological Hazard and Control Vol. 11(2000), pp.6-10, in Chinese.