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) UMEZU Kenichiro,Positive solutions of a forced nonlinear elliptic boundary value problem,Journal of the Mathematical Society of Japan,00255645,一般社団法人 日本数学会,1999,51,4,801-815,https://cir.nii.ac.jp/crid/1390001205116022528,https://doi.org/10.2969/jmsj/05140801