著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Akiyama Masahiko and Kamakura Tomoo,Elliptically curved acoustic lens for emitting strongly focused finite-amplitude beams: Application of the spheroidal beam equation model to the theoretical prediction,Acoustical Science and Technology,13463969,一般社団法人 日本音響学会,2005,26,3,279-284,https://cir.nii.ac.jp/crid/1390001205089492992,https://doi.org/10.1250/ast.26.279