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) HASEGAWA Yukiko,On the Goursat problem in the Gevrey class for some second order equations,Journal of the Mathematical Society of Japan,00255645,一般社団法人 日本数学会,2003,55,3,669-679,https://cir.nii.ac.jp/crid/1390001205114940288,https://doi.org/10.2969/jmsj/1191418996