Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
48,932
Directory of Open Access Journals: DOAJ Articles
2,521
University of Tromsø: Munin Open Research Archive
2,301
Unknown
2,261
Zenodo
1,607
Wiley Online Library
1,509
PubMed Central (PMC)
940
LeibnizOpen (The Leibniz Association)
808
PANGAEA - Data Publisher for Earth & Environmental Science
722
NTNU Open Archive (Norwegian University of Science and Technology)
705
Norwegian Institute for Nature Research: Brage NINA
666
Institute for Marine Research: Brage IMR
643
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
643
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
638
University of Bergen: Bergen Open Research Archive (BORA-UiB)
540
Open archive Norwegian University of Life Sciences: Brage NMBU
528
RePEc (Research Papers in Economics)
509
Springer Nature (via Crossref)
499
Cambridge University Press
487
North Dakota State University (NDSU): Digital Horizons
474
Informa (via Crossref)
462
HighWire Press (Stanford University)
424
ScienceDirect (Elsevier - via Crossref)
376
Université de Nantes: HAL-UNIV-NANTES
361
NGU Open Archive (Geological Survey of Norway)
352
UNESDOC - UNESCO Digital Library
342
Defense Technical Information Center: DTIC Technical Reports database
327
Copernicus Publications: E-Journals
325
Dryad Digital Repository (Duke University)
310
University of Tromsø: Septentrio Academic Publishing
300
Aarhus University: Research
294
Wiley Online Library (via Crossref)
291
David Rumsey Historical Map Collection (Cartography Associates)
289
DataverseNO
260
MDPI Open Access Publishing
252
Niedersächsisches Online-Archiv NOA
246
Arctic Council Repository
241
University of Michigan: Digital Collections
241
University of Copenhagen: Research
214
Institut national des sciences de l'Univers: HAL-INSU
196
CESSDA DC Data Catalogue (Consortium of European Social Science Data Archives)
195
ScienceDirect (Elsevier)
194
norden (Nordic Council of Ministers): Publications (DiVA)
191
Digital.CSIC (Spanish National Research Council)
183
Open archive Nord universitet
171
Oxford University Press (via Crossref)
170
Arctic Data Center (via DataONE)
165
da|ra - Registration agency for social and economic data
165
Informa
161
Norwegian Institute for Water research: NIVA Open Access Archive (Brage)
161
more ...