1. Du Ziqin. 1984. Analytical drawing of stability of rock space landslide [C]. In: International Symposium on Landslides. Toronto, (5): 489–494.
2. Editorial Groups of Landslide corpus. 1984. Collected Landslide Works [M]. Beijing: China Railway Press, (4): 64–78. (in Chinese).
3. Hu Guangtao. 1988. Landslide Dynamics [M]. Xi’an: Shaanxi Science and Technique Press, 56–79 (in Chinese).
4. Liu Zudian. 1989. On sliding in Loess region and its treatment [J]. Yellow River,1(6): 25–29 (in Chinese).
5. Lu Zhongyou. 1984. Basic characteristics of landslide distribution and main types landslides in China [C]. In: International Symposium on Landslides. Toronto, (5): 411–418.