1. AASHTO
(2008). LRFD Bridge Design Specifications 4th edition 2007 with 2008 Interim Revisions. American Association of State Highway and Transportation Officials.
2. BSI
(1994) Code of Practice for Earth Retaining Structures. BSI. (Note: this code was replaced by a new version in 2015.)
3. BSI
(2005) BS EN 1990:2002 +A1:2005. Eurocode - Basis of structural design. BSI.
4. BSI
(2013) BS EN 1997-1:2004 +A1:2013. Eurocode 7: Geotechnical design - Part 1: General rules. BSI.
5. CEN
(2014) Robustness in Eurocodes. Document CEN_TC_250_WG_6_N_10.