1. AASHTO (2007). LRFD Bridge Design Specifications. 4 th Edition with 2008 and 2009 Interims American Association of State Highway and Transportation Officials Washington D.C.
2. AASHTO (2002). Standard Specifications for Highway Bridges 17 th Edition American Association of State Highway and Transportation Officials Washington.
3. Allen T.M. Nowak A.S. and Bathurst R.J. (2005). Calibration to Determine Load and Resistance Factors for Geotechnical and Structural Design Transportation Research Board Circular E-C079 Washington D.C. 93p.
4. Allen T.M. Bathurst R.J. and Berg R.R. (2002). "Global level of safety and performance of geosynthetic walls: an historical perspective" Geosynthetics International (Vol. 9 Nos. 5-6) pp. 395-450.
5. Allen T. Christopher B.R. Elias V.E. and DiMaggio J. (2001) Development of the Simplified Method for Internal Stability Design of Mechanically Stabilized Earth (MSE) Walls Washington State DOT Research Report WA-RD 513.1 108 p.