1. Yamagami T., Ueta Y. Search for noncircular slip surfaces by the Morgenstern-Price method [J]. Proc., 6th Int. Conf. Numer. Methods in Geomech., 1988, (6): 1219-1223.
2. Clough A. K. Variable factor of safety in slopes stability analysis by limit equilibrium method [J]. 1st Eng., 1988, 69(3): 149-155.
3. Chen Z. Y. , Shao C.M. Evaluation of minimum factor of safety in slope stability analysis [J]. Can. Geotech., 1988, 25(4): 735-748.
4. Meiketsu Enoki, Mori., Yagi., Ryuichi et al. Generalized slice method for slope stability analysis [J]. Soil. Found, 1988 , 30(2):1-13.
5. Lü Qing. Study on Prevention and Treatment Technology of Slope Engineering Disasters [D]. Hangzhou:Zhejiang university, (2006).