1. Study of sinkholes on weakly cemented sand, Centrifuge;Abdulla,1994
2. Structure in soil under high loads;Allgood;Journal of the Soil Mechnaics and Foundations Division,1971
3. Die dimensionerung des tunnelmauserwerks;Bierbaumer,1913
4. The strength and dilatancy of sands;Bolton;Geotechnique,1986
5. Arching in soil due to the deflection of a rigid horizontal strip;Chelapati,1964