Selected search engines for scientific OA publications
- BASE (Bielefeld Academic Search Engine)
Search engine of Bielefeld University for academic internet sources
- edoc
Search engine of the Humboldt University of Berlin
- noah.nrw
Digital media from the universities of North Rhine-Westphalia
- OAister
Search engine for metadata of documents on document servers that comply with the OAI standard (Open Archives Initiative), responsible University of Michigan
- Google Scholar
Search for scientific literature
- ZVDD (Central Index of Digitised Prints)
- Gallica
Digitisation project of the French National Library, Paris