1. ACI 318-05, 2005. Building Code Requirements for Structural Concrete and Commentary. American Concrete Institute, Farmington Hills, MI, USA.
2. Ahmadi-Nedushan, B., Varaee, H., 2009. Optimal Design of Reinforced Concrete Retaining Walls Using a Swarm Intelligence Technique. Proceedings of the First International Conference on Soft Computing Technology in Civil, Structural and Environmental Engineering, Funchal, Madeira, Portugal. Civil-Comp Press, Stirlingshire, UK, p.26. [doi:10.4203/ccp.92.26]
3. Basudhar, P.K., Vashistha, A., Deb, K., Dey, A., 2008. Cost optimization of reinforced earth walls. Geotechnical and Geological Engineering, 26(1):1–12. [doi:10.1007/s10706-007-9143-6]
4. Bowles, J., 1982. Foundation Analysis and Design. McGraw-Hill, New York, USA.
5. Budhu, M., 2006. Soil Mechanics and Foundations. John Wiley & Sons, New York, USA.