1. Institute of Energy Economics and the Rational Use of Energy, University of Stuttgart, Hessbruehlstrasse 49a, 70565 Stuttgart, Germany
2. Institute for Systems Theory and Automatic Control, University of Stuttgart, 70550 Stuttgart, Germany
3. Bosch Power Tec GmbH, Herrenberger Str. 130, 71034 Böblingen, Germany
4. Institute of Environmental Engineering, Swiss Federal Institute of Technology Zurich, CH-8093 Zurich, Switzerland
5. Department of Mathematical Sciences, University of Bath, Bath BA2 7AY, United Kingdom
6. Institute of Agriculture and Food Research and Technology, 08348 Cabrils, Barcelona, Spain
7. Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI 48109-2029, United States
8. Quantis, EPFL Science Park (PSE-D), University of Stuttgart, CH-1015 Lausanne, Switzerland