1. Soil stresses and deformations beneath rigid wheels;Onafeko;J. Terramechanics,1967
2. Improved wheel performance on sand by controlled circumferential rigidity;Wiendieck;U.S. Army Corps of Engineers W.E.S. Technical Report M-69-2,1969
3. Prediction of rigid wheel performance based on the analysis of soil-wheel stresses;Wong;J. Terramechanics,1967
4. Energy dissipation and drawbar pull prediction in soil-wheel interaction;Yong,1969
5. The performance of rigid cylindrical wheels on clay soil;Uffelmann,1961