1. Cavity expansion in sands with curved envelopes;Baligh;J. Geotech. Eng.: ASCE,1976
2. Field tests on piles in sand;BCP Committee;Soils Found.,1971
3. The strength and dilatancy of sands;Bolton;Géotechnique,1986
4. Discussion on the strength and dilatancy of Sands;Bolton;Géotechnique,1987
5. Load transfer for axially loaded piles in clay;Coyle;Int. J. Soil Mech. Found. Div.: ASCE,1966