Web of Science (Core Collection) This link opens in a new window Science Citation Index Expanded contains over 8,500 of the world's leading scientific and technical journals across 150 disciplines. Search by topic, author, source title, author address, cited author, cited work and cited year. This database does not contain the full text of articles; however, many citations include abstracts. Coverage from 1977-present. To limit your search to Science Expanded, choose Web of Science from the Search dropdown menu, then Advanced Search, then More Settings.