@inproceedingsAl-Ashtari_Hunstig_Hemsel_Sextro_2013, place=Hannover, Germany, series=Berichte aus dem IDS, title=Characteristics of Piezoelectric Energy Harvesters in Autonomous Systems, number=05/2013, booktitle=Proceedings of 10th International Workshop on Piezoelectric Materials and Applications and 8th Energy Harvesting Workshop, Hannover, Germany, 14.-17.7.2013, author=Al-Ashtari, Waleed and Hunstig, Matthias and Hemsel, Tobias and Sextro, Walter, year=2013, pages=159–161, collection=Berichte aus dem IDS 
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