1. Piston-ring lubrication — part I: The historical development of piston-ring technology;Economou,1979
2. A study of the effects of piston-ring and engine design variables on piston-ring friction;Rohde,1979
3. Piston lubrication and cylinder bore wear analysis, part I — Theory;Ting;J. Lubr. Technol.,1974
4. Calculated inter-ring gas pressures and their effect upon ring pack lubrication;Ruddy;Daros information,1979
5. Piston-ring lubrication — part II: Theoretical analysis of a single ring and a complete ring pack;Dowson,1979