1. Preliminary results from an investigation into the rolling resistance of towed wheels;McAllister;Nat. Inst. Agric. Engng Dept. Note DN/T/917/0012,1979
2. Contribution to the study of the mechanics of soil-vehicle systems with special reference to tractors;Sohne;Grundl. Landtech,1963
3. Comparative traction performance of R1, R3 and R4 tractor tires;Taylor;Trans. Am. Soc. agric. Engrs,1976
4. Problem of power conversion through the driving wheels of large tractors;Steinkampf;Grundl. Landtech.,1977