1. Good WR. A Few Observations About Paper Machine Lubrication. SKF Ball Bearing Journal No. 202, p. 8.
2. Recognition of the Causes of Bearing Damage as an Aid in Prevention;Walp,1958
3. Handbook of loss prevention,1978
4. Gear Failure Modes—Importance of Lubrication and Mechanics;Ku;ASLe Transactions,1976
5. Handbook of loss prevention,1978