1. Principal stress rotation : A missing parameter;Arthur;ASCE. Jour. Geotechnical Eng. Div.,1980
2. Permanent displacement of sand with cyclic loading;Bouckovalas;Journal of the Geotechnical Engineering Division, ASCE,1984
3. A simple stress-strain relationship for sands;Bouckovalas;Norwegian Geotechnical Institute, Research Report 51410-1, June.,1985
4. Analytical prediction of permament strain due to cyclic loading of sands;Bouckovalas;Norwegian Geotechnical Institute, Research Report 51410-2, September.,1985
5. Non-linear analysis of stress and strain in soils;Duncan;JSMFED, ASCE,1970