Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Yoshihara Fujie,Discussions on Infrastructures,HISTORICAL STUDIES IN CIVIL ENGINEERING,0916-7293,Japan Society of Civil Engineers,1999,19,,171-178,https://cir.nii.ac.jp/crid/1390282679304427392,https://doi.org/10.2208/journalhs1990.19.171