Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Osumi Ayumu and Mukaiyama Yuriko and Ito Youichi,Defect imaging of solid material by surface wave method and harmonic multi-beam of high-intensity aerial focus ultrasonic wave,THE JOURNAL OF THE ACOUSTICAL SOCIETY OF JAPAN,03694232,Acoustical Society of Japan,2018-08-01,74,8,431-434,https://cir.nii.ac.jp/crid/1390282763097088640,https://doi.org/10.20697/jasj.74.8_431