Oxford University Research Archive (ORA)
Consists of journals, books, dissertations, conference papers and other scientific works with open access.
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HighWire Press – Stanford University
Consists over 2 million open access articles.
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European Patent Office
Offers over 110 million patents from all over the world.
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SpringerOpen
Full-text access to peer-review journals in various science fields.
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Journals for Free
Offers open access to over 17 000 scientific journals.
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Directory of Open Access Journals
Consists of nearly 4 million articles published in more than 13 251 journals from all over the world.
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The Digital Commons Network
Offers open access to more than 3 million articles from more that 590 institutions.
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Index Copernicus
Indexes more than 2500 journals from all over the world selected by certain criteria.
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Paperity
Consists of over 1.5 million full-text articles published in more than 4200 journals. There is a full-text search for most of them.
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CiteSeerX
Consists of more than 750 000 full-text resources.
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SciELO
Offers access to more than 985 full-text journals.
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arXiv
Repository of e-preprints and articles.
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CogPrints: Cognitive Sciences Eprint Archives
E-archive where authors present their scientific publications.
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OMICS International
Offers access to more than 700 leading peer-review journals.
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MDPI
Indexes more than 240 peer-review open access journals in all science fields.
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Scientific Research Publishing (SCIRP)
Offers open access to more than 200 academic journals.
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Russian Science Citation Index
Bibliographic database which offers reference search. Some of the resources are full-text.
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SCIndeks - Serbian Citation Index
Offers access to more than 250 journals published in the Republic of Serbia.
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Научная электронная библиотека „КиберЛенинка”
A scientific digital library which consists of more than 2 million articles in Russian.
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