Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SAKUYAMA KAORI and KITAGAWA YOSHIKAZU,Correspondence of the stiffness-degradation to structural damage,"NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan",,National Committee for IUTAM,2004,53,0,110-110,https://cir.nii.ac.jp/crid/1390001205588961152,https://doi.org/10.11345/japannctam.53.0.110.0