1. Application examples-rocker arms;Kano;J. Jpn. Soc. Tribol.,1989
2. Y. Ogawr., M. Machida, N. Miyamura, K. Tashiro and M. Sugano, Ceramic rocker arm insert for internal combustion engines, SAE Paper 860397, p. 1.
3. S. L. Narasimhan and J. M. Larson, Valve gear wear and materials, SAE Paper 851497.
4. Mechanism of boundary lubrication with zinc dithiophosphate;Geoges;Wear,1979
5. Examination of wear mechanism in automotive camshafts;Jahanmir;Wear,1986