1. Comparison of wire rope life using nylon and steel sheaves;Chen,1979
2. Caterpillar L1 and Chevrolet L4 test process;Cree,1953
3. Friction and wear devices;Cree,1976
4. Sweating on paws and palms: What is its function;Adelman;American Journal of Physiology,1975
5. Standard test methods for measurement of extreme pressure properties of lubricating fluids (Four-Ball Method), ASTM Standard-D 2783-88.