C.R.I. Clayton, V.S. Hope, G. Heymann, J.P. Van der Berg & A.V.D Bica,
2000, Proceedings of the Institution of Civil Engineers - Geotechnical Engineering, 143(3), 119-30
C.R.I. Clayton, V.S. Hope, G. Heymann, J.P. Van der Berg & A.V.D Bica,
2000, Proceedings of the Institution of Civil Engineers - Geotechnical Engineering, 143(3), 119-130