Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Okamoto Shunzo and Kato Katsuyuki and Hakuno Motohiko,ON THE SEISMIC FORCE ACTING ON STRUCTURES UNDER THE GROUND,Transactions of the Japan Society of Civil Engineers,00471798,Japan Society of Civil Engineers,1963,1963,92,37-53,https://cir.nii.ac.jp/crid/1390001205373204608,https://doi.org/10.2208/jscej1949.1963.92_37