1. Albuquerque, P. J. R., D. Carvalho, and E. B. Fontaine. 2010. Pile capacity for Omega piles in an unsaturated Brazilian soil using the CPT. Proceedings of 2nd International Symposium on Cone Penetration Testing, Huntington Beach, CA, USA.
2. Drilled Displacement Piles – Current Practice and Design
3. Modeling of Installation and Quantification of Shaft Resistance of Drilled-Displacement Piles in Sand
4. HKSP, B.1965. The maximum pulling force on a single tension pile calculated on the basis of results of the adhesion jacket cone. Proceedings of the 6th international conference on soil mechanics and foundation engineering, Montreal, Canada Vol. 2. p. 229.