1. Effects of vertical loading on lateral screw pile performance;Al-Baghdadi T. A.;Proc. Inst. Civ. Eng. Geotech. Eng.,2017
2. ASTM. 2007a. Standard test methods for deep foundations under static axial compressive load. ASTM 1143/D1143M-07. Annual Book of ASTM Standards. West Conshohocken, PA: ASTM.
3. ASTM. 2007b. Standard test methods for deep foundations under static axial tensile load. ASTM D3689-07. Annual Book of ASTM Standards. West Conshohocken, PA: ASTM.
4. The principle of effective stress;Bishop A. W.;Teknik Ukeblad,1959
5. Budhu, M. 2010. Soil mechanics and foundations. 3rd ed. Hoboken, NJ: Wiley.