Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) NAGAYAMA Isao,Theoretical Review of Modal Analysis of Vibration and Consideration on Seismic Design of Concrete Gravity Dams Using Modified Seismic Coefficients,Journal of Japan Society of Dam Engineers,09173145,Japan Society of Dam Engineers,2018,28,1,15-20,https://cir.nii.ac.jp/crid/1390001204381909504,https://doi.org/10.11315/jsde.28.15