Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Matsuzawa Kiichiro,Sound Propagation in a Tube of Arbitrary Cross-Sectional Shape,THE JOURNAL OF THE ACOUSTICAL SOCIETY OF JAPAN,03694232,Acoustical Society of Japan,1963,19,1,1-8,https://cir.nii.ac.jp/crid/1390282681540677760,https://doi.org/10.20697/jasj.19.1_1