1. AASHTO (2002). Standard Specifications for Highway Bridges 17 th Edition American Association of State Highway and Transportation Officials Washington DC
2. AASHTO (2009). LRFD Bridge Design Specifications 2009 Interims American Association of State Highway and Transportation Officials Washington DC.
3. AASHTO (2010). LRFD Bridge Design Specifications 5th Edition American Association of State Highway and Transportation Officials Washington DC.
4. AMSE (2006). "Reduced Zinc Loss Rate for Design of MSE Structures " A White Paper by the Association for Metallically Stabilized Earth available at www.amsewalls.org/technical_papers.html
5. Allen T.M. Bathurst R.J. (2001). "Application of the K o -Stiffness Method to Reinforced Soil Limit States Design " Washington State Department of Transportation Report No. WA-RD 528.1 Olympia WA