1. Wheels for lunar vehicles;Freitag;J. Terramechanics,1972
2. Power requirements for wheels operating in fine-grained soils;Melzer,1972
3. Analytical prediction of vehicle performance;Dugoff,1972
4. A dimensional analysis of the performance of pneumatic tires on soft soils;Freitag,1965
5. Mechanics of wheels on soft soils; a method of analyzing test results;Leflaive,1966