Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Yamamoto Mitsuru and Ishimura Hiroshi and Hama Yoshinori and Inoue Takeshi,Low-Frequency Sound Source with Dual Bending Radiation Surfaces.,Japanese Journal of Applied Physics,00214922,The Japan Society of Applied Physics,1998,37,5B,3161-3165,https://cir.nii.ac.jp/crid/1390282681224436224,https://doi.org/10.1143/jjap.37.3161