Media type: E-Article Title: Modeling of a ring rosen-type piezoelectric transformer by Hamilton's principle Contributor: Nadal, Clement; Pigache, Francois; Erhart, Jiri imprint: Institute of Electrical and Electronics Engineers (IEEE), 2015 Published in: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control Language: Not determined DOI: 10.1109/tuffc.2014.006719 ISSN: 0885-3010 Keywords: Electrical and Electronic Engineering ; Acoustics and Ultrasonics ; Instrumentation Origination: Footnote: