Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) ICHIKAWA Fumihiko and TAKADA Hajime and ASANO Kazuya and SADAHIRO Kenichi,A Sound Velocity Measurement System for Thin Steel Sheet Based on Ultrasonic Interferometry,Tetsu-to-Hagane,00211575,The Iron and Steel Institute of Japan,1997,83,4,245-250,https://cir.nii.ac.jp/crid/1390001205184301568,https://doi.org/10.2355/tetsutohagane1955.83.4_245