1. Liu Tehong. Problems of Expansive Soils in Civil Engineering. Beijing: Architecture and Building Press of China, 1997 (in Chinese)
2. Bao Chenggang, Gong Biwei, Zhan Liangtong. Properties of unsaturated soils and slope stability for expansive soils. In: Proceedings of the 2nd International Conference on Unsaturated Soils. Beijing: International Academic Publishers, 1998, 2:71–98
3. Liao Jichuan. Engineering geological properties of expansive soils in cut slopes. In: Proceedings of Symposium on Theory and Practice of Unsaturated Soils. Beijing: Chinese Society of Civil Engineering, Division of Soil Mechanics and Foundation Engineering, 1992 (in Chinese)
4. Huang Shaojian, Ke Zhengjing, Fang Qiuyuan. Field monitoring of weather, suction, water content, and deformation in an expansive soil slope. In: Proceedings of Sino-Canada Symposium on Unsaturated Soils. Wuhan: Chinese Society of Civil Engineering, Division of Soil Mechanics and Foundation Engineering, 1994 (in Chinese)
5. Xu Yongfu. Mechanical properties of unsaturated expansive soils and its engineering application. Dissertation for the Doctoral Degree. Nanjing: Hehai University, 1997 (in Chinese)