1. The Motor Vehicle (Construction and Use) Regulations,1966
2. Investigations into braking of tractors and trailers;Bjerninger;Trans. R. Inst. Technol., Stockholm,1959
3. Braking performance of a Massey-Fergusson FE-35 tractor when coupled to (a) a Massey-Ferguson two-wheel unbalanced trailer and (b) a Whitlock four-wheel trailer;Manby;N.I.A.E.R/T 635,1963
4. Westinghouse-Drukluftbremsanlage fur landwirtschaftliche Schlepperzuge (Westinghouse pneumatic braking system for agricultural trailers);D.L.G. Test Report, 1018,1964
5. Behaviour of tractor and trailer during braking;Czene;Jarmuvek, Mezogazdosagi Gepek,1967