1. Bio-hydraulic oils. www.biohydraulicfluids.com Last visited: June 2010.
2. Improvement Potential for Energy Consumption in Discrete Part Production Machines;Devoldere,2007
3. Energy Related Life Cycle Impact and Cost Reduction Opportunities in Machine Design: The Laser Cutting Case;Devoldere,2008
4. Energy Consumption Assessment and Optimisation in the Design and Use Phase of Machine Tools;Dietmair,2010
5. Lifecycle Impact Reduction and Energy Savings through Light Weight Eco-Design of Machine Tools;Dietmair,2010