Su, W.-J.W.-J.SuZu, J.J.ZuWEI-JIUN SU2018-09-102018-09-102013http://www.scopus.com/inward/record.url?eid=2-s2.0-84889658051&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/378537An innovative tri-directional broadband piezoelectric energy harvesterjournal article10.1063/1.4830371