Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) "D'Ancona, Piero and Kinoshita, Tamotu",On the Wellposedness of the Cauchy Problem for Weakly Hyperbolic Equations of Higher Order (Microlocal Analysis and Related Topics),数理解析研究所講究録,1880-2818,京都大学数理解析研究所,2002-05,1261,,46-55,https://cir.nii.ac.jp/crid/1050001202108663424,