Finding free publications

The following search tools are available for finding freely accessible full texts:


The Directory of Open Access Journals can be searched for quality-assured Open Access journals as well as for individual articles that are freely accessible.


The Bielefeld Academic Search Engine is one of the world's largest search engines for academic documents on the World Wide Web. Approximately 60% of all documents indexed there are freely accessible in full text.


For online articles whose full texts cannot be accessed due to a paywall, the browser plug-in Unpaywall  online shows whether there is a freely accessible version of the article. It is available for FirefoxGoogle Chrome and Microsoft Edge zur Verfügung. Unpaywall uses symbols to indicate whether the text is available free of charge.

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