1. Kuhrke, B., Erdle, F.: Energieeffizienz als Investitionskriterium. Werkstatt + Betrieb: WB 143(1-2), 30–32 (2010)
2. Federal Environmental Agency (publ.): Energieziel 2050: 100% Strom aus erneuerbaren Quellen, Germany (2010)
3. Zein, A., Li, W., Herrmann, C., Kara, S.: Energy Efficiency Measures for the Design and Operation of Machine Tools: An Axiomatic Approach. In: Glocalized Solutions for Sustainability in Manufacturing - 18th CIRP International Conference on Life Cycle Engineering (LCE 2011), pp. 274–279. Springer, Heidelberg (2011)
4. Kuhrke, B., Schrems, S., Eisele, C., Abele, E.: Methodology to access the energy consumption of cutting machine tools. In: Proceedings of the 17th CIRP International Conference on Life Cycle Engineering (LCE 2010), Hefei, China, pp. 76–82 (2010)
5. Verl, A., Abele, E., Heisel, U., Dietmair, A., Eberspächer, P., Rahäuser, R., Schrems, S., Braun, S.: Modular Modeling of Energy Consumption for Monitoring and Control. In: Glocalized Solutions for Sustainability in Manufacturing - 18th CIRP International Conference on Life Cycle Engineering (LCE 2011), pp. 341–346. Springer, Heidelberg (2011)