Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Yamamoto Mitsuru and Shiba Hiroshi and Fujii Taro and Hama Yoshinori and Hoshino Takamichi and Inoue Takeshi,Tonpilz Piezoelectric Transducer with a Bending Piezoelectric Disk on The Radiation Surface,Japanese Journal of Applied Physics,00214922,The Japan Society of Applied Physics,2003,42,5B,3221-3224,https://cir.nii.ac.jp/crid/1390282681232678656,https://doi.org/10.1143/jjap.42.3221