Web of Science
Web of Science includes three databases: Science Citation Index Expanded, Social Sciences Citation Index, and Arts & Humanities Citation Index. It indexes over 12,000 journals and 120,000 conference proceedings with the strongest coverage in the sciences (over 8,500 journals), followed by social sciences (over 3,000 journals), and arts and humanities (over 1,700 fully indexed journals). Our Web of Science subscription includes articles published from 1987 to the present; updated weekly. For impact factor information about specific journals use Journal Citation Reports.