1. The wear of metals under unlubricated conditions;Archard,1956
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3. The influence of temperature on metallic wear;Lancaster,1957
4. The formation of surface films at the transition between mild and severe metallic wear;Lancaster,1963
5. The dry wear of steels, I, The general pattern of behaviour;Welsh;Philos. Trans. R. Soc. London, Ser. A,1964