Content Provider
Unknown
76
Directory of Open Access Journals: DOAJ Articles
55
norden (Nordic Council of Ministers): Publications (DiVA)
55
CESSDA DC Data Catalogue (Consortium of European Social Science Data Archives)
52
WikiBooks - Open-content textbooks
46
DataCite Metadata Store (German National Library of Science and Technology)
32
Wiley Online Library
29
Arctic Council Repository
28
PubMed Central (PMC)
28
University of Copenhagen: Research
22
PANGAEA - Data Publisher for Earth & Environmental Science
16
Aalborg University's Research Portal
15
University of Tromsø: Munin Open Research Archive
14
Aarhus University: Research
13
Institute for Marine Research: Brage IMR
13
Technical University of Denmark: DTU Orbit
13
Cambridge University Press
11
Opin vísindi (Iceland)
10
Skemman (Iceland)
10
University of Southern Denmark Research Portal
10
Defense Technical Information Center: DTIC Technical Reports database
8
Hathi Trust Digital Library
8
Hirsla - Landspítali University Hospital research archive
8
University of St Andrews: Research Portal
8
DataCite
7
Digital.CSIC (Spanish National Research Council)
7
HELDA – University of Helsinki Open Repository
7
Lund University Publications (LUP)
7
University of Bergen: Bergen Open Research Archive (BORA-UiB)
7
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
6
SAGE Publications
6
Zenodo
6
Aberdeen University Research Archive (AURA)
5
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
5
HighWire Press (Stanford University)
5
Informa
5
NHH Brage Open institutional repository (Norwegian School of Economics)
5
Natural Environment Research Council: NERC Open Research Archive
5
OpenAgrar (OA)
5
Oxford University Press
5
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
5
University of Tromsø: Septentrio Academic Publishing
5
University of the Highlands and Islands: Research Database of UHI
5
Apollo - University of Cambridge Repository
4
Edinburgh DataShare (University of Edinburgh)
4
Norwegian Institute for Nature Research: Brage NINA
4
Springer Nature (via Crossref)
4
Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive
4
University of St Andrews: Digital Research Repository
4
University of Turku: UTUPub
4
more ...