Chang, S. HS. HChangLin, J. F.J. F.Lin2008-10-282018-06-282008-10-282018-06-282003-06-12http://ntur.lib.ntu.edu.tw//handle/246246/85678application/pdf564469 bytesapplication/pdfen-USAnalysis and Optimization of Trimorph Ring Transducersjournal articlehttp://ntur.lib.ntu.edu.tw/bitstream/246246/85678/1/02.pdf