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) ESAKI L.,Superlattice and negative differential conductivity in semiconductors,IBM J. Res. Dev.,,,1970,14,1,61-68,https://cir.nii.ac.jp/crid/1573668925443231360,