1. The effect of increasing strength with depth on the bearing capacity of clays;Davis;Geotechnique,1973
2. The bearing capacity of footings on nonhomogeneous clays;Livneh;Proc. 8 th ICSMFE,1973
3. The ultimate bearing capacity of foundations;Meyerhof;Geotechnique,1951
4. Bearing capacity of cohesive soil stratum;Nakase;Report of the Port and Harbour Research Institute,1966
5. Foundation Engineering;Peck,1953