1 DOAJ (Directory of Open Access Journals): https://doaj.org .
2 OKI (Open Knowledge International): https://okfn.org/about .
3 ResearchGate: www.researchgate.net .
4 Academia.edu: www.academia.edu .
5 EUDAT: https://eudat.eu .
6 ROARMAP (Registry of Open Access Repository Mandates and Policies): http://roarmap.eprints.org.
7 FinELib: www.kiwi.fi/display/finelib/In+English.