1. Wang, Y. S., Narasimhan, S., Larson, J. M., Larson, J. E. and Barber, G. C., “The effect of operating conditions on heavy duty engine valve and seat wear,” Wear, Vol. 201, No. 1–2, pp. 15–25, 1996.
2. Malatesta, M. J., Barber, G. C., Larson, J. M. and Narasimhan, S. L., “Development of a Laboratory Bench Test to Simulate Seat Wear of Engine Poppet Valves,” Tribology Transactions, Vol. 36, No. 4, pp. 627–632, 1993.
3. Lewis, R., Dwyer-Joyce, R. S. and Josey, G., “Investigation of Wear Mechanisms Occurring in Passenger Car Diesel Engine Inlet Valves and Sear Inserts,” SAE Paper, No. 1999-01-1216, 1999.
4. Chun, K. J., Hong, J. S. and Lee, H. J., “A Study on Engine Valve and Seat Insert Wearing Depending on Speed Change,” SAE Paper, No. 2004-01-1655, 2004.
5. Giles, W., “Valve Problems with Lead Free Gasoline,” SAE Paper, No. 710368, 1971.