@inproceedings{30515, author = {{Romaus, C. and Böcker, Joachim and Witting, K. and Seifried, A. and Znamenshchykov, O.}}, booktitle = {{2009 IEEE Energy Conversion Congress and Exposition}}, publisher = {{IEEE}}, title = {{{Optimal energy management for a hybrid energy storage system combining batteries and double layer capacitors}}}, doi = {{10.1109/ecce.2009.5316428}}, year = {{2009}}, }