S. Kreitlein and N. Eder and A. Syed-Khaja and J. Franke, Comprehensive Assessment of Energy Efficiency within the Production Process. journal = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology. August 2015, vol. 103(7). 1359 - 1366 [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10002390.