1. Bond, D. (1961) The influence of foundation size on settlement,Geotechnique,2, pp. 121?43.
2. Brinch-Hansen, J. (1968) A revised and extended formula for bearing capacity, Preprint of Lecture in Japan.
3. Brown, J.D. and Meyerhof, G.G. (1969) Experimental study of bearing capacity in layered clays,Proc. 7th ICSMFE, Mexico City,2, pp. 45?51.
4. Burmister, D.M. (1956) Stresses and displacement characteristics of a two-layer rigid base soil system: influence diagnose and practical applications,Proceedings, Highway Res. Board,35, p. 773.
5. Button, S.J. (1953) The bearing capacity of footings on a two-layer cohesive subsoil,Proc. 3rd ICSMFE, Zurich,1, pp. 332?5.