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) DRUCKER D. C.,On uniqueness in the theory of plasticity,Quarterly of Applied Mathematics,,,1956,14,,35-42,https://cir.nii.ac.jp/crid/1573950399306832256,