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| arXiv |
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| An open-access archive for scientific papers in physics, mathematics, computer science, quantitative finance, and statistics. |
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| BASE (Bielefeld Academic Search Engine) |
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| A powerful search engine for academic open access content, particularly useful for STEM and business topics. Indexes over 240 million documents from scientific repositories and publishers. |
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| CiteseerX |
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| CiteSeerx is an evolving scientific literature digital library and search engine that has focused primarily on the literature in computer and information science. CiteSeerx aims to improve the dissemination of scientific literature and to provide improvements in functionality, usability, availability, cost, comprehensiveness, efficiency, and timeliness in the access of scientific and scholarly knowledge. |
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| CORE |
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| Aggregates millions of open access research papers from STEM and business fields. Allows users to search across global repositories for articles, conference papers, and more. |
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| Google Scholar |
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| Google Scholar provides a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: peer-reviewed papers, theses, books, abstracts and articles, from academic publishers, professional societies, preprint repositories, universities and other scholarly organizations. |
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| JURN |
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| A unique search-engine dedicated to indexing free and open access journals and theses in the arts and humanities, science, biomedical, business and ecology related topics. |
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| OAIster |
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| OAIster is a union catalog of millions of records that represent open access resources. |
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| OASIS |
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| Openly Available Sources Integrated Search (OASIS) is a search tool for finding open content, including textbooks, courses, course modules, audiobooks, video and more. |
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| Semantic Scholar |
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| Free search engine powered by AI, focused on academic research in STEM disciplines. Provides access to peer-reviewed papers and articles in computer science, biology, and business. |
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