1. The shear strength of a fine sand;Bjerrum;Proc., 5 th ICSMFE,1961
2. Direct simple shear tests on a Norwegian quick clay;Bjerrum;Geotechnique,1966
3. Problems of soil and construction on soft and structurally unstable soils (collapsible, extensive and others);Bjerrum,1973
4. On liquefaction phenomena;Casagrande;Geotechnique,1971
5. Liquefaction of sand;Castro,1969