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)
Ishida Haruhisa,The Cauchy problem for weakly hyperbolic equations of second order,Tsukuba Journal of Mathematics,0387-4982,Institute of Mathematics University of Tsukuba,1999-06,23,1,1-26,https://cir.nii.ac.jp/crid/1050282677593925504,