Eberspächer P. Schraml P. Verl A. Abele E. Schlechtendahl, J.. Multi-level energy demand optimizer system for machine tool controls: Multi-level energy demand optimizer system for machine tool controls. S. 1-6--, Elsevier, Ischia, 2015. [PUMA: Energy ISW Machine Optimization; Tool efficiency; isw-2015 xsl]