1. A dimensional analysis of the performance of pneumatic tires on clay;Freitag;J. Terramechanics,1966
2. Small scale footing studies in sand and clay;Goodman;Highway Res. Record,1966
3. Theory of Land Locomotion;Bekker,1956
4. A laboratory study of the settlement of loaded rectangular plates into soft soil;Pollitt,1948
5. Principles of soil-vehicle mechanics;Reece,1965