1. The behaviour of axially and laterally loaded single piles embedded in nonhomogeneous soils;Banerjee;Geotechnique,1978
2. Équilibre d’élasticité d’un sol isotrope sans pesanteur, supportant différents poids;Boussinesq;C. R. Acad. Sci.,1878
3. Axially loaded 5 pile group and single pile in sand;Briaud,1989
4. The elastic analysis of compressible piles and pile groups;Butterfield;Geotechnique,1971
5. Butterfield, R., Douglas, R., 1981. Flexibility Coefficients for the Design of Piles and Pile Groups. Report 086017171X, p. 81.