The Observational Method in Ground Engineering: Principles and Applications: CIRIA 1999Report 185. CIRIA, London
Basis of Design: EN 1990 2000CEN/TC250, 4 September 2000
Eurocode 7. Geotechnical Design. Part 1 - General Rules: EN 1997-1 2004CEN/TC 250/SC 7, September 2004
Designers? Guide to EN 1997-1. Euocode 7:Geotechnical Design ? General Rules: Frank, R.; Bauduin, C.; Driscoll, R.; Kavvadas, M., Krebs Ovesen, N.; Orr, T. and Schuppener, B. 2004Thomas Telford, London, p.213
Designers? Guide to EN 1990. Euocode: Basis of Structural Design: Gulvanessian, H., Calgaro, J. A. and Holický, M. 2002Thomas Telford, London, p.161
