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) Aizu Kêitsiro,Theorems Relating to Catastrophe Indices and to the “Fourth” Checkpoint for Second-Order Transitions,Journal of the Physical Society of Japan,00319015,一般社団法人 日本物理学会,1980,48,3,762-765,https://cir.nii.ac.jp/crid/1390001204184209408,https://doi.org/10.1143/jpsj.48.762