Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
49,011
Directory of Open Access Journals: DOAJ Articles
2,507
University of Tromsø: Munin Open Research Archive
2,295
Unknown
2,236
Zenodo
1,605
Wiley Online Library (via Crossref)
937
PubMed Central (PMC)
924
Wiley Online Library
788
LeibnizOpen (The Leibniz Association)
773
PANGAEA - Data Publisher for Earth & Environmental Science
747
NTNU Open Archive (Norwegian University of Science and Technology)
703
Norwegian Institute for Nature Research: Brage NINA
668
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
643
Institute for Marine Research: Brage IMR
640
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
637
University of Bergen: Bergen Open Research Archive (BORA-UiB)
540
Informa (via Crossref)
533
Open archive Norwegian University of Life Sciences: Brage NMBU
526
Cambridge University Press
522
RePEc (Research Papers in Economics)
509
Springer Nature (via Crossref)
499
ScienceDirect (Elsevier - via Crossref)
497
North Dakota State University (NDSU): Digital Horizons
474
HighWire Press (Stanford University)
424
Université de Nantes: HAL-UNIV-NANTES
375
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
321
Dryad Digital Repository (Duke University)
310
Aarhus University: Research
308
David Rumsey Historical Map Collection (Cartography Associates)
296
University of Tromsø: Septentrio Academic Publishing
296
University of Copenhagen: Research
269
MDPI Open Access Publishing
251
Institut national des sciences de l'Univers: HAL-INSU
244
Niedersächsisches Online-Archiv NOA
243
Arctic Council Repository
241
University of Michigan: Digital Collections
241
SAGE Publications (via Crossref)
239
CESSDA DC Data Catalogue (Consortium of European Social Science Data Archives)
195
norden (Nordic Council of Ministers): Publications (DiVA)
192
Lund University Publications (LUP)
185
Digital.CSIC (Spanish National Research Council)
178
Oxford University Press (via Crossref)
177
Open archive Nord universitet
170
Arctic Data Center (via DataONE)
165
da|ra - Registration agency for social and economic data
165
DataverseNO
163
HELDA – University of Helsinki Open Repository
162
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