1. Union Indépendante de l’Industrie Européenne des Lubrifiants,2011
2. Best Practice Guide for the Disposal of Water-mix Metalworking Fluids;Chipasa,2011
3. Commission of the European Communities,2011
4. Practical Lubrication for Industrial Facilities;Bloch,2009
5. Fluid Contamination Control;Fitch,2008