1. ACI Committee 318 (2005). Building code requirements for structural concrete and commentary, American Concrete Institute, Farmington Hills, Mich., p. 430.
2. Ahmadi, B. and Varaee, H. (2009). “Optimal design of reinforced concrete retaining walls using a swarm intelligence technique.” The First International Conference on Soft Computing Technology in Civil, Structural and Environmental Engineering, UK.
3. Babu, S. G. and Basha, B. (2008). “Optimum design of cantilever retaining walls using target reliability approach.” International Journal of Geomechanics, Vol. 8, No. 4, pp. 240–252.
4. Basudhar, P. K. and Lakshman, B. (2006). “Optimal cost design of cantilever retaining walls.” India: IGC, Chennai, pp. 14–16.
5. Brooks, H. (2010). Basics of retaining wall design, HBA Publication.