1. Brown , J. D. and G. G. Meyerhof . 1969 . experimental study of bearing capacity in layered clays .Proceedings the seventh International Conference on Soil Mechanics and Foundation Engineering, Mexico City , Mexico , 2 : 45 – 51 .
2. Bearing Capacity Determination by Limit Analysis
3. Cundall , P. A. 1971 . A computer model for simulating progressive, large-scale movements in block rock systems .Proc. Int. Symp. on Rock Fracture, Nancy , France , 1 : 8 – 17 .