1. Poulos HG (1968) The influence of rigid pile cap on the settlement behaviour of an directly loaded pile: C.E. Trans Inst Eng Aust CE10(2):206–208
2. Butterfield R, Banerjee PK (1971) The problem of pile group-pile cap interaction: Geotech 21(2):135–142
3. Balaam NP, Booker JR (1981) Analysis of rigid rafts supported by granular piles. Int J Numer Anal Method Geomech 5:379–403
4. Randolph MF (1983) Design of piled raft foundations. In: Proceedings of international symposium on recent developments in laboratory and field tests and analysis of geotechnical problems, Bangkok, pp 525–537
5. Lee JS, Pande GN (1998) Analysis of stone-column reinforced foundations. Int J Numer Anal Meth Geomech 22:1001—1020