4ZIENKIEWICZ O C, HUMPHESON C, LEWIS RW. Associated and non-associated viscoplasticity and plasticity in soil mechanics[J]. Geotechnique, 1975, 25(4): 671-689.
5MATSUI T, SAN K C. Finite element slope stability analysis by shear strength reduction technique[J]. Soils and Foundations, 1992, 32(1): 59 - 70.
6GRIFITHS D V, LANE P A. Slope stability analysis by finite elements[J]. Geoteehnique, 1999, 49(3): 387 - 403.
7LANE P A, GRIFITHS D V. Assessment of stability of slopes under dmwdown conditions[J]. Joumal of Geotechnical and Geoenvironmental Engineering, ASCE, 2000, 126(5): 443-450.
8SMITH I M, GRIFITHS D V. Programming the finite element method[M]. 3rd ed. New York: John Wiley and Sons Chichester, 1998.
9DAWSON E M, ROTH W H, DRESCHER A. Slope stability analysis by strength reduction[J]. Geotechnique, 1999, 49(6): 835 - 840.