A Comparison of Mechanical Properties and Failure Processes of Saturated and Unsaturated Slate from Sichuan-Tibet Plateau Area, China oleh Liang-Juan Zheng, He-Ping Xie, Zheng-Xuan Xu, Jian-Hui Deng, Dong Wang, Guang-Ze Zhang, Cun-Bao Li, Ru Zhang, Gan Feng