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FREE Resources: 3 articles every 2 weeks (Register and Read Program, archived journals). Also, early journals (prior to 1923 in US, 1870 elsewhere) free, no registry necessary. Free and Subscription JSTOR [89] Jurn: Multidisciplinary Jurn is a free-to-use online search tool for finding and downloading free full-text scholarly works.
Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. . Released in beta in November 2004, the Google Scholar index includes peer-reviewed online academic journals and books, conference papers, theses and dissertations, preprints, abstracts, technical reports, and other ...
CiteSeer X (formerly called CiteSeer) is a public search engine and digital library for scientific and academic papers, primarily in the fields of computer and information science. CiteSeer's goal is to improve the dissemination and access of academic and scientific literature.
Semantic Scholar is a research tool for scientific literature. It is developed at the Allen Institute for AI and was publicly released in November 2015. [2] Semantic Scholar uses modern techniques in natural language processing to support the research process, for example by providing automatically generated summaries of scholarly papers. [3]
Unpaywall, begun as an interface for oaDOI.org, [12] [13] is a browser extension [14] which finds legal free versions of (paywalled) scholarly articles. [15] In July 2018, Unpaywall was reported to provide free access to 20 million articles, [1] which accounts for about 47% of the articles that people search for with Unpaywall. [16]
Articles found using these links and may provide you with information to expand your search. Use Internet Archive scholar, CORE or another open-access search engine to look for an open version of the article. Using either the DOI, Google Scholar, or the journal's website, find out what databases index the article in full text.
Though the search engines may be accessed for free, indexed images themselves may be under restricted license. Google Books [3] - Searchable archive of magazines and books (some full-text, including photograph captions and references to photographs from related articles and content).
As of December 2022, the independent database contains more than 18,650 open access journals and 8,265,272 articles covering all areas of science, technology, medicine, social sciences and the humanities. [3]