1. Techniques for Measuring Soil Physical Properties;ADAS,1982
2. New Methods of Studying Soil Detachment due to Water Drop Impact;Al-Durrah;Soil Science Society of America Journal,1981
3. Parameters for Describing Soil Detachment due to Single Water Drop Impact;Al-Durrah;Soil Science Society of America Journal,1982
4. Soil Physics;Baver,1972
5. Fundamental Considerations on the Shear Strength of Soil;Bjerrum;Geotechnique,1950