Life-cycle oriented development of machine tools, Denkena, B., Harms A., Jacobsen J., Lange D., Möhring H. - C., and Noske H. , Proceedings of 13th CIRP International Conference on Life Cycle Engineering, LCE 2006, "Towards a closed loop economy", Volume 2, May 31st - June 2nd 2006, (2006)