Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) NATSUME Ken-Ichiro,PATENTSCOPE: WIPO's database on patent information,Journal of Information Processing and Management,00217298,Japan Science and Technology Agency,2013,56,7,425-439,https://cir.nii.ac.jp/crid/1390282680483593728,https://doi.org/10.1241/johokanri.56.425