1. American Pile Driving, Inc. as seen on March 2, 2007.
2. Application de l'Eurocode 7 en Belgique: Directives pour le dimensionnement en ELU de pieux sous charge axiale en compression, Version de mars 2008.
3. Bauduin, C. 2001. Design procedure according to Eurocode 7, and analysis of the test results. Screw Piles - Installation and Design in Stiff Clay, Holeyman (ed.), Swets and Zeitlinger, Lisse, pp. 275–303.