altmetrics is a newly developed means of measuring impact based on data from social media, such as blogs, tweets, bookmarks and downloads.
Citations indicate the use and dissemination of research findings, originally developed as an alternative to classification of subject areas.
Google Scholar is a search engine that indexes scholarly literature that is accessible online and provides citation counts.
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.
Social network media are defined as a group of technologies which all allow virtual interaction and communication between sender and receiver.
Web of Science (WOS) is a cross-discipline database which, together with bibliographic information, includes reference lists from the indexed publications.