1. Soil Failure Beneath Rigid Wheels;Wong,1966
2. Theory of Land Locomotion;Bekker,1956
3. The Performance of Rigid Cylindrical Wheels on Clay Soil;Uffelmann,1961
4. An Analysis of the Soil Stresses and Deformations Beneath a Rigid Wheel;Onafeko,1965
5. Soil Stresses and Deformations Benath Rigid Wheels;Onafeko;J. Terramechanics,1967