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)
LEIGHTON H.,First 20 precision among world Web search services (search engines),J. Am. Soc. Inf. Sci.,,,1999,50,10,870-881,https://cir.nii.ac.jp/crid/1570572701764277120,