6Moore,P.J.Evaluation of earth pressure on retaining walls.Conference:Developments in Geotechnical Aspects of Embankments,Excavations,and Buried Structures,Bangkok,Thail Sponsor:Asian Inst of Technology;Canadian Int Development Agency;Southeast Asian Geotechnical Soc.1991,p 247-260.
7Raj Jalla,Design of multiple level retaining walls,Journal of architectural engineering,1999.9,82-88.