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System for Information on Grey Literature in Europe, is your open access to 700.000 bibliographical references of grey literature (paper) produced in Europe and allows you to export records and locate the documents.

Examples of grey (gray) literature include technical or research reports, doctoral dissertations, some conference papers, some official publications, and other types of grey literature.

OpenGrey covers Science, Technology, Biomedical Science, Economics, Social Science and Humanities.

The site includes preprints from the GL conferences (GreyNet International) in full text.


  • 201609/13 The National Library of Technology (NTK) hosts its 9th annual Conference on Grey Literature and Repositories in Prague (CZ), 19 octobre 2016
  • 201604/25 Explore videos and other resources, share good practice guides through the GreyGuide web portal
  • 201604/18 Find records providing a link to the full text with the following search: link:1
  • 201604/18 9th annual Conference on Grey Literature and Repositories at the National Library of Technology in Prague (CZ), October 19th, 2016 - Call for Papers

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Documents :
(total number of PDF: 1058)
Number of citations by Sciences: 833,500

Social Science and Humanities: 325,000

Biomedical Science: 116,000

Science: 170,000

Technology: 222,500