著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) INDRARATNA B.,Development of negative skin friction on driven piles in soft Bangkok clay,Canadian Geotechnical J.,,,1992,29,3,393-404,https://cir.nii.ac.jp/crid/1574231876422940928,