Citations indicate the use and dissemination of research findings, originally developed as an alternative to classification of subject areas.
Journal Citation Reports (JCR) is a product from Thomson Reuters that annually publishes Journal Impact Factors (JIF).
Journal Impact Factors (JIF) was a system conceived by Eugene Garfield in 1955 as a means of identifying journals for inclusion in Science Citation Index (SCI).
Some journal indexes order journals according to their 'quality', while other indexes function more as a directory.
Development and use of journal lists with OA, copyright and impact factor information.
Web of Science (WOS) is a cross-discipline database which, together with bibliographic information, includes reference lists from the indexed publications.