1. Engine Friction — A Change in Emphasis;Monaghan;Inst. Mech. Engrs., 2nd BP Tribology Lecture,1987
2. Lubricating Oil — Extraction and Chemical Analysis;Picken,1991
3. Piston Ring Lubrication — Part III, The Influence of Ring Dynamics and Ring Twist;Ruddy,1979
4. Piston System Design for Low Emissions;Gazzard,1995
5. Piston Ring Microwelding Phenomenon and Methods of Prevention;Shuster;SAE Paper 960745,1996